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Old 06-23-2013, 06:46 PM   #1
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Holiday Rambler Owners Club
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A/C fuse for the engine driven compressor

On my HR Imperial 40' the engine driven A/C compressor is failing to engage. The owner's manual refers to a 20 amp fuse for the compressor but does not indicate where it is located. I spoke to "Rob" with tech support for Holiday Rambler and he said, it is in the rear of the coach."

After much searching, I called back, spoke to "Rob" again and received the same (non) help. I have emailed Holiday Rambler from their web site, but no reply in a week.

Does anyone on this site know where I might look? It is a 40WDS Imperial, 1999 model with the Roadmaster chassis with the optional 350hp Cummins.

Thanks in advance!

HBT
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Old 06-23-2013, 07:06 PM   #2
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Could be low on gas...safety switch prevents compressor if internal pressure is to low
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Old 06-24-2013, 07:41 AM   #3
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Thanks for the reply. My tech tested the pressure and had 40 lbs. on the low side. It that sufficient?

HBT
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Old 06-24-2013, 06:42 PM   #4
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Quote:
Originally Posted by TexasMarine View Post
Thanks for the reply. My tech tested the pressure and had 40 lbs. on the low side. It that sufficient?

HBT
Depends on the ambient temperature, but generally yes. That means it has some quantity of Freon. However, the compressor may start and then immediately shut off because there isn't enough, and the low (suction side of the compressor) side pressure gets too low. So pressure only isn't enough to tell what the freon level is. Other problems may be that low side pressure switch has gone bad, the compressor clutch has gone bad, the evaporator coil temperature sensor has gone bad (if it has one), the high limit cutout switch has gone bad, or the controls themselves have gone bad. However, always start with the fuse. I guarantee there is one somewhere. It is usually in one of the chassis or dashboard fuse blocks.
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Old 06-25-2013, 05:42 AM   #5
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Bartlettj,

Thanks for the concise and comprehensive reply. I will start the trouble shooting.

HBT
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