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01-15-2013, 09:23 PM
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#1
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Junior Member
Join Date: Jan 2013
Posts: 2
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7.5 Gen Set faulty temp sensor
7.5 Gen set in my 2005 Itasca, Meridian is shuting down after about a minute of run time. Glo plug won't come on either. Fault code of 1 and 33 which is "overheating". This is not the case, doesn't run long enough to get hot. Problem is faulty temp. sensor. I have read about the extreme difficulties in getting to this sensor. Can anyone direct me to the end of the white wire that comes from the sensor? is it accessable so that it can be disconnected. I know this is just a temporary fix.
thanks
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01-15-2013, 10:02 PM
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#2
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Senior Member
Alpine Owners Club
Join Date: Jun 2003
Location: Ontario, CA USA
Posts: 1,403
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Hello & Welcome to IRV2.
Sorry to hear about your problem with your Genset. The problem is the water temperature sensor. Contact Onan with the model &Serial Number for the water temperature sensor replacement part or you can take it to an Onan service center for repair.
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01-16-2013, 08:56 AM
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#3
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Senior Member
Country Coach Owners Club
Join Date: Jan 2011
Posts: 1,204
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I had a sensor go bad and they had to remove the genset from the coach to get to it. If they take yours out have them replace everything on that side or stuff that is hard to get to while it's out including the fuel line. I would suggest going to a Cummings dealer to have it done.
Good luck
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01-16-2013, 10:39 AM
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#4
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Senior Member
Join Date: May 2009
Posts: 259
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You should state the make and model of your generator. I have a generac 75D that does not roll out and I replaced my sensor. You need to get the top cover off and in order to do that I had to take off the front panel and the drivers side panel. My sensor was on the back side of the motor near the top. I could not see it but you can see the wire and follow it to the sensor. You can get the wrench size from the new one or just do it by feel. For something I couldn't see it actually wasn't that bad to replace, the covers are the worst part.
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Dave
2004 Newmar KSDP 3353
Surrey B.C.
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01-16-2013, 04:49 PM
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#5
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Senior Member
Join Date: Aug 2008
Location: Georgia
Posts: 8,638
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You haven't had the coolant changed have you? So don't know that you just can't refill then by putting the coolant in the reservoir tank.
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2007 Fleetwood Revolution LE 40V
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01-16-2013, 07:49 PM
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#6
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Senior Member
Join Date: Feb 2012
Location: Baton Rouge, LA
Posts: 1,202
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I am aware of three water temperature sensor failures in friend's coaches. In those cases, the generator had to be removed from the coach to get to the temp sensor, not an easy task. Hope yours is easier than that.
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Jim and Lynda, (Sophie, Jake, attack trained killer Shi-Tzus :-))
2003 Fleetwood Expedition 38N 2005 Saturn Vue
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01-16-2013, 07:59 PM
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#7
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Senior Member
Join Date: Dec 2006
Location: St. Augustine, FL
Posts: 3,595
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dkreb, Looks like you got tons of answers.........too bad none of them are to the question you asked.
Visit flightsystems.com and look y=for their RV Generator t-shoot pages. There may be an answer there for you
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KIX
'02 Ultimate Advantage 40J Spartan MM - Cummins ISC
2013 Jeep Rubicon JK Unlimited
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01-17-2013, 08:11 AM
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#8
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,704
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If you disconnect the sensor, you will get a fault 24 instead - no coolant temp sensing - and the genny will shut down after 5 minutes. It won't let you run without receiving a signal from the sensor.
The coolant sensor can be difficult to get at in many coaches and also is fairly likely to be seized in place. There is a heat shield to one side that gets in the way, plus the coach body itself probably makes it awkward unless the genny pulls out on a slide.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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01-17-2013, 10:12 PM
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#9
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Junior Member
Join Date: Jan 2013
Posts: 2
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7.5 Onan Gen Set Problem
Thanks for all the replies and especially you Gary RV. You are correct about code 24 and saved me a lot of time. I got a wiring diagram from Onan and now know how to get to the wires. but will have to try a different approach
dkreb
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01-17-2013, 11:22 PM
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#10
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Senior Member
Join Date: Sep 2011
Location: Las Vegas
Posts: 704
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Quote:
Originally Posted by dkreb
Thanks for all the replies and especially you Gary RV. You are correct about code 24 and saved me a lot of time. I got a wiring diagram from Onan and now know how to get to the wires. but will have to try a different approach
dkreb
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You may want to do a search for user Fire up over at RV.net. For some reason I thought he did a very detailed write up on his itasca a while back with pictures.
__________________
Craig
2020 Winnebago View 24D
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