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tropical36's avatar
tropical36
Explorer
Oct 12, 2016

Onan 7.5 Quiet Diesel Problem

Always starts and runs good for however long you'd like, but don't shut it down and expect to restart it again, while it still hot or even still warm, as it will shut itself down after 5 minutes and send a code 24 (Controller did not sense temperature change during first 5 minutes of operation). Corrective Action: See and authorized Onan dealer.
Had a Cat dealer order me a sensor that is supposed to be the most likely culprit, so now the question is, has anyone personally done this and where might this part be located? I've looked a every drawing I can find and can't find any reference to this particular sensor.
The genset doesn't slide out the front like some and really hope I won't have to drop it for access. The top cover has limited clearance and looks doubtful for being able to remove such. Let alone work on any parts contained within. Then again, towards the front might be possible if one can remove the cover.
Anyway, any insight to the problem will be appreciated and am putting off taking it to Cummins, as a last resort.

3 Replies

  • doc brown wrote:
    Mine is not on a slide, so it has to be dropped to do any inside service.

    Yeah, a bummer for sure, but then again, I'm not so sure what the front end would have to look like for a slide out on our coach and do like the looks of it, with being kinda timeless in it's style and design.
    Now looking at this thing and more than once, it doesn't look like much of a job to disconnect it and drop it down.
  • Mine is not on a slide, so it has to be dropped to do any inside service.