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Old 08-24-2022, 12:58 PM   #1
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Location: Whidbey Island, WA
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Overheating generator

This is a new question added to the thread about the Power tech generator.

Jeff Jones at PowerTech keeps telling me that Country Coach did not engineer the genset bays correctly and we need to get more air into the radiator end of the genset bay. He says lots of people have had this issue.
I know that other manufacturers have as well.

Can anyone tell me or send me pictures how your coach has been modified to get more fresh air into the genset bay?

I'm really needing some advise on this so that it looks nice and is functional in keeping the genset cool enough to keep running.

Pictures would be wonderful. Thanks in advance.
2000 Country Coach Intrigue

2008 Jeep Sahara Unlimited
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Old 08-24-2022, 10:32 PM   #2
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What specific problems are you having?

My Onan 12.5 genset in my 2003 Lexa would overheat, but only on very hot days (> 100), travelling fast, with all 3 rooftop AC on.

Things improved substantially with a good cleaning of the radiator, a new thermostat and coolant replacement (it hadn't been that long) made no more improvement, but it still ran hot in such conditions. As soon as I stopped driving (rest stop, etc.), temps would drop fairly quickly, so it was clearly related to traveling - my theory is that low pressure develops on the front (radiator intake) side, reducing overall airflow volume.

My solution is to never run all 3 rooftop AC when traveling - two is plenty, and if I stop and it's warm in one of the zones, it's ok to turn on the third. though it might take a little bit longer to cool off the coach at the start of a trip if it's been parked at 100+.

A related issue is that though the OTR AC is still blowing cold it's noticibly weaker in recent years, vs the 40,000+btu of cooling I should be getting between from the front and rear evaporator zones. Once I service (on my list), I'm sure it'll be blasting cold air and I'll perhaps not need to run overhead air at all even at 100+.
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Old 08-30-2022, 03:52 PM   #3
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My 2008 Allure with Onan does not overheat... Even in 105 degrees. Aren't they all designed the same? Where the intake is at the bottom of the generator?
2008 Country Coach Allure (Crane Prairie) 45' / ISM500
2016 Lincoln MKX Black Label
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Old 08-30-2022, 10:13 PM   #4
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Intake is at bottom along with the hot air exit point. Trying to find the right location to add a vent in the generator bay door.
2000 Country Coach Intrigue

2008 Jeep Sahara Unlimited
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generator, heat, heating, overheating

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