THE GENERATOR SEEMS DEAD - THE GENERATOR RUNS BUT THERE IS NO POWER IN MY ROADTREK!

This article applies to Roadtreks with the Onan gasoline powered generator Microlite 2800 models up to the KY model that came out mid to late 2012. It applies to the KV model that is the model before the KY and should apply to earlier Onan's.  I DO NOT KNOW if it applies to the newest Onan Microlite 2800 model as that has a very different motor.

 

The Onan Microlite 2800 gasoline  generator in the Roadtrek will at times not start - it does not try to start and stop. When the start switch is pressed - either on the wall or inside the generator itself - the motor seems to be DEAD! This could be a mechanical issue inside the Onan but the first thing to check is the FUSE inside the Onan.  Early Roadtreks had the Onan in a compartment on the outside of the van on the side wall.  These are easy to work with inside the generator. Later Roadtrek moved the generator under the chassis of the van.  Look under the rear bumper toward the driver's side and you will see it hanging down.  The FUSE is inside the generator case. The fuse is between the Roadtrek battery(ies) and the ignition of the generator motor and this goes through the generator's control panel. 

 

 

Sometimes the generator starts just fine - and runs perfectly but there is no 120 volts of AC power coming out of the generator.  You turn on the A/C and nothing happens! You turn on the microwave and nothing happens! The first thing to check is the CIRCUIT BREAKER inside the Onan! The internal Onan CIRCUIT BREAKER is between the Onan's output and the Roadtrek! 

As you can see in the illustration above - the breaker and the fuse are near each other. 

 Getting to the Onan when it is under the chassis -  

I should not have to say this but before going to the generator SHUT THE GENERATOR OFF!

 Sorry to say, you have to crawl under the back of the van's rear bumper on the driver's side either on your back or on your belly. When you get close enough it will be above your head - and it is a pain to work on it propping yourself up on your elbows or reaching up on your back looking at it upside down. 

You then have to remove the access panel on the front of the Onan's case by pushing up on the two buttons - shown in the first illustration - at the same time and then pull forward and down on the panel to take it off.  Once the panel is off you will see an  open space in the middle - as shown in the second illustration.  In the picture here it is easy to see. Looking inside the Onan upside down or trying to look up at it - it is not so easy to see.  You might not see it all all.  if that is the case you are going to have to rely on touch.  

 FOR THE FUSE - PUT TWO FINGERS IN AND FEEL FOR IT - it is a regular automotive blade type fuse - 5 amps. Get hold of it with two fingers and pull it out (try not to drop it). Look into the center of the top of the fuse and see if the metal connection inside is broken. If so the fuse is blown and must be replaced - and when you do so the generator will start right up - if this was what the problem is. 

FOR THE CIRCUIT BREAKER -  PUT A FINGER DOWN AND FEEL FOR THE LITTLE BLACK HANDLE THAT POINTS TO THE PASSENGER SIDE.  Once you find it push it DOWN TO RESET IT and then with a finger under it PULL IT UP TO SET IT. It will click into place and stay there.    

 If you want to wait to put the access panel door back on and go and try the generator to see if all is well, then there is no problem leaving it off until you go inside and turn on the generator and if it was the fuse make sure it starts and if it was the circuit breaker to make sure you now have power.  Then crawl under again and put the access panel back on.    You have to push up the two buttons again and put the top in first and swing the bottom into the Onan to close the panel - once set in let go of the buttons  and if they don't want to go on their own - push them down to lock the panel on. 

IF you changed the fuse and want to start the generator with the internal start switch - shown above - you can BUT the generator when it starts is going to vibrate and you do not want to have your hands or your head anywhere close to it. I don't recommend it having done it. 

 WHY DID THE FUSE BLOW?  The generator may have overloaded when starting.  When the generator is being difficult to start - do not just keep holding onto the start switch inside the Roadtrek. Let off the switch - wait a half minute and then push the button again. After several attempts to start it - let is sit for ten minutes and then try again.   

 WHY DID THE CIRCUIT BREAKER TRIP? This can happen if a load over 2800 watts is put on the Onan - A/C turned on and then the Microwave is turned on at the same time. AC is running and a hair dryer is plugged into an RT outlet and turned on.   

BUT IT IS VERY COMMON FOR THE BREAKER TO BE SHUT OFF WHEN ANYONE - PRO OR OWNER DOES ANYTHING INSIDE THE ONAN - INCLUDING JUST CHECKING THE OIL.                                                    

What happens is the set breaker handle is located close enough to the top of the open space that hands easily hit it down and turn it off. I have been at an Onan shop and when they told me it was ready and aI went inside to turn it on and make sure - and the Onan is running - great! - BUT the microwave display is dark (this is a quick place to look to see that you have power as when plugged in or running the Onan the display is lit - even though the microwave is not turned on. I turned on the A/C just to make sure - A/C - it did not start - just like it was dead - which it is without any 110/120 volt electricity. I called the service tech back over and told him to go under again and put the breaker back on - as he obviously hit it when he was working inside. He was not happy. They hate going under to work on it also. 

WHAT IF NEITHER OF THESE WORK TO FIX IT?    

The least expensive thing to have happened is a connection from either the fuse or the breaker came off of the Control Board. This happened to me - found by an Onan service tech - we both thought it was the breaker but a wire from the breaker came loose on the control board inside the Onan.  Worst case is there is something much bigger wrong with the Onan.                                                                                                                                                                                                                                                                ======================  

The last time I had my Onan in for service I watched the service tech go under in a different way to work on the Onan. He rolled under on a mechanic's creeper from behind the driver's rear tire from the driver's side of the Roadtrek. He was not on the ground. The mechanic's creeper lifted him up high enough to more easily look inside and get inside of the Onan. Every so often Harbor Freight stores put a nice creeper on sale for less than $30. (No I don't work for Harbor Freight and I get nothing from them for mentioning their store! (I wish I did 😉!) 

The two illustrations are from the Onan KV manual.  If you do not have an Onan manual, EMAIL US! and I have a KV and a KY manual that I will email you the one you need. I also have a KV service manual which is very thick in pages. I can email that to you if  you ask for it - it is for the KV but the basics will apply to the KY. Be sure to tell me in the email if your Onan is a KV or KY so that you get the correct manual.  These are no longer easy to find on the Cummins/Onan website.                                                                                                                                                                                                                                                     

                                                                                                                                                                                                      

Another Generator Tale and Some Basics to Know When the Generator is Not Working

 Our Roadtrek has been sitting on the driveway for over a year and a half because of Covid-19. We live in an area that was hard hit by the virus and we pretty much stayed indoors only going out once every several weeks for essentials. Trips that we had hoped to be able to take in 2020 were not possible. Places that we wanted to go to - if we could have gone away had canceled all of their events or just closed. I have been going out to the Roadtrek and starting the engine every week. We took it for a few local two hour drives - out and back to keep it running, charge the batteries, besides plugging in to charge the batteries. I also had to keep exercising the generator for its monthly two hour continuous run with a half load which is either the air conditioner running or in the cold weather an electric radiant home portable heater plugged into one of the Roadtrek outlets. I did this diligently until February 2021 when it snowed here every week and the snow piled up around the Roadtrek and we could not get into it. It ran fine when it was exercised in January and shut off fine as well.

The second week in March 2021, the weather was getting better. Most of the snow had melted and I went out to exercise the generator. I started the van engine to boost the batteries that are needed to start the generator, put the battery switch on, and pushed the generator start button on the wall inside the Roadtrek. What should have happened was the generator starting to crank, catch, and run. I should have seen the amber light on the switch come on. None of that happened. What did happen was the light did not come on with the switch held in, there was no noise at all - there was no cranking, and when I took my finger off the switch, the switch light did flash on and off once, and I could hear a noise toward the back of the van (where the generator is under the chassis) that went clunk - once. Oh boy!  I tried several times more. 

I went into the house to get Meryl as I was going to try to crawl under the back of the can to the generator - something I am not supposed to do because of a physical issue - and try to start the generator from the switch that is behind the access panel on the front of the generator.  She came out with me - basically to pull me out if I could not get out from under the van - and I crawled under. I opened the access panel - two push up tabs on the bottom of the panel releases it which is easy to do if you are not lying under the van on your side trying to reach up while still supporting yourself on your elbows. I looked inside and the start switch is right there. I pushed the switch and nothing. This switch has no light but when I released the switch I did here the single clunk.

There is a 5 amp fuse inside the generator. This fuse is there to protect the generator starting electronics.  If this fuse is blown, the generator will NOT start. If I could get to the fuse and see if it has blown, then replace it, the generator MIGHT start. The problem was the fuse is down and behind other components and I could not see it. I could not even feel it when I tried to get my finger down to where I thought it should be.  At that point, I could stay under the van any longer and I put the generator access panel back on and crawled backwards to get out - with Meryl's help. 

It was March. Covid-19 was still very much present and we had not been able to schedule appointments for the Covid vaccine. We decided to just leave it alone until we were fully vaccinated and it was warmer to deal with. And we knew it had to be brought into a Cummins/Onan authorized service center. 

By the end of May we were both fully vaccinated and we were trying to get the Roadtrek ready for hopefully being able to start to travel again. I called the generator shop which is in the next county about a 45 minute drive.  They gave me a morning appointment to bring the Roadtrek for them to work on the generator. 

We took the Roadtrek to the Onan shop the morning of the appointment. The appointment was for 10am. We arrived at 9:45. Since we were not sure how long they would need it to work on, Meryl drove the Roadtrek there and I followed in the car.  We parked in the back of the building where the entrance to the shop is and we walked around the building to the office entrance and let them know we were there. We were told just to wait with the Roadtrek in the back as the service tech was finishing a job offsite and would be back very soon. At about 10:20 or so, he arrived. I explained that it would not start and what it did when not starting. He asked where the generator is and I told him and he said, "I was afraid of that!".  He did not like working lying on the ground either.  I showed him the start button inside and turned on the battery switch.  I also told him that the last time they worked on it, it also did not start which was 2018 and the paperwork I have from that repair said the fuse had come loose. He went to the switch inside the Roadtrek and tried to start it - and it did exactly what I had been doing for me  - not start. We told him we would wait or if he thought it would be long we could go and come back. He said either way and we stayed but we had to leave the shop and watch through the open garage door. He went under the van with a work light and in about five minutes I hear the generator start. It has not done that in three months.  He shut it off and started it twice more. As he crawled out I shouted into the garage - "Was it the fuse?" He said it was - it was loose.  I asked why would it go loose and he told me that is what he would have to find out now.

If you have ever been concerned about the Roadtrek being put up on a lift - what he did next (and I knew this is what this shop does as they did it with my Roadtrek in the past) - would make you cringe as I do every time I see them do this.  He got into a forklift and drove it behind the Roadtrek. He centered the fork with the center of the bumper, lowered the fork down and drove under the back of the Roadtrek and raised the fork until it made contact with the bottom of the chassis and lifted the back up about two feet off the  ground.  Then he went back under.  I could not really see what he was doing from that point so I went to sit in the car with Meryl to read an ebook on my phone.

The car was parked on the other end of the parking lot and after awhile I moved the car and parked it facing the open garage door and the Roadtrek. About an hour went by and he looked like he was finishing and then he put the back of the Roadtrek down  with the  forklift.  I went over and asked him if it was done. It was. This all was just less than an hour including the regular maintenance that I asked be done on the generator. I asked him about the loose fuse and what did he do about it so that it would not go loose again. He told me then that it turned out not to be the fuse. He thought it was at first because when he put his fingers in around the fuse, he was pushing around and thought he felt the fuse seat back in, and  then then the generator was able to start. When he looked closer with the Roadtrek lifted up he found a plug and socket that are supposed to be tightly snapped together and not come apart and it is right behind the fuse. When he touched the fuse earlier he had actually pushed the plug and socket close enough together for the generator to be able to start. OK, but I had to ask why would this have come apart. What he told me I don't really accept,but it was working and there was no reason to question further. He told me that when it was all put together originally this was not snapped tightly together as it should have been. I said that was ten years ago and he just shrugged. BUT the Onan started.  

Now, back in 2016 when I first brought the Roadtrek to this same shop to work on the generator, they had to take it down to repair it and took it apart. It is possible that this plug and socket were not tightly snapped back together then and over time with all the vibrating the generator does when it runs, it is possible that finally in January 2021, this connection shook loose. I don't know. As long as it works now - I am fine with it.  

He also did as I had asked them to do, an oil change, a fuel filter change, and a spark plug change. That was all done.  I then asked him - and this is the important part of this story, if he tested it under load. He had not. What this means is did he test the generator running with a load - something running inside the Roadtrek powered at 110 volts by the generator - like the air conditioner. He said I could do that while he stood by but he wanted me to bring the Roadtrek outside the shop to do so as he did not want to fill the shop with exhaust. Fair enough, 

I baked the Roadtrek out of the garage, went to the switch and the generator started right up. Then I let it run for three minutes - I usually let it warm up for five minutes before putting on a load but I did not want to make him wait around too long for me to do that so I let it run for three minutes this time, then I turned on the A/C. NOTHING! I knew exactly what was wrong. We called him outside and let him know and he went under the van to the generator and clicked the circuit breaker back up. 

When there is no power coming from the Onan the circuit breaker is tripped - and any work done inside the small space in the generator, a hand will surely find the circuit breaker switch and accidentally knock it down to off. He was under and I thought he had already reset the breaker but had not. I tried the A/C and again nothing. The generator was still running. I plugged in the microwave which I keep unplugged over the winter (just to not overwhelm the Onan when I exercise it every month and in the cold it is harder starting it). The microwave had power. I slid the A/C switch to ON and it started. He had by then reset the circuit breaker. 

SO - the point here is  - if you have work done on the generator, even just an oil change, or you do work on the Onan - if there is no power inside with the Onan running -  the service tech or you hit the circuit breaker handle and turned it off. That is fairly simple to get to and flip it back up.

This Onan shop which is a sales and service center for all types of generators from big house and really large worksite generators to as small as the Onan Microlite 2800. We have been there when they were working on a large Class A's generator. They charge $166 an hour labor plus parts. Our job took just less than an hour and we were charged $170. total. This included the labor time, the oil, the fuel filter, and the spark plug.  This was a LOT less than we were anticipating.  

The Onan now runs with the push of the switch and we  know that if we need it, it is ready.  In the next few days I will exercise it for its usual two hours a month with the A/C running to get it back to its usual exercise routine.
 

A FEW THINGS TO TAKE AWAY ABOUT THE GENERATOR FROM THIS TALE:

How this service tech went under the Roadtrek - without it lifted up  - was interesting and maybe it is how others do it.  He went under with a creeper and went in from the side and not straight in under  the bumper (as I go under). This might give a little more ability to move under the low van and if I have to go under I will try it that way.  It seems a lot better than going head in from under the bumper and the hitch.

MORE IMPORTANT:

1)  If your generator does not start, the first thing to try to check is the fuse. The fuse if blown will prevent the generator from starting as no 12 volt power is getting to the generator's starter.

2) If your generator is running BUT there is NO POWER coming from it to the inside of the Roadtrek 110 volt appliances plugged in, the first thing to check is the circuit breaker INSIDE the Onan at the front looking in. Reset that breaker by flipping it UP and you should now have power inside the Roadtrek from the generator. 

Of course with both of these - IF NOTHING MORE IS WRONG!  

 

Here is a link to our general Onan Generator Article - for much more detail about how it works. 

 IF YOU WOULD LIKE TO CONTACT US TO ASK A QUESTION ABOUT ANYTHING YOU READ IN THIS ARTICLE PLEASE EMAIL US USING THE LINK IN THE RIGHT COLUMN OF THIS PAGE.