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Up in the front of the coach there is a Evans temperature control valve that allows hot water from the engine to flow to allow heat in the dash... Often this valve allows hot water to flow even if you are calling cold air for the a/c, which means your a/c air is not cold. In order to correct this, many people put a ball valve in line to shut off the flow of hot water. This "fix" for improving cold air is documented with pictures in the irv2 tips section. If your prior owner installed this ball valve, you will find it up in the front of the coach above the generator. If it is, indeed there, you only have to open the valve to get the hot water flowing. Just a thought....worth checking out..
Tom and Karen
2014 Newmar Mountain Aire 4369
2014 Jeep Grand Cherokee Ltd.
Last weekend I took off down the road and discovered no heat in my newmar that I bought during the summer. Then I remembered the previous owner talking about a ball valve under the hood. So I pulled over, found that valve, and BAM -- heat!!
2000 Newmar Dutch Star 38' Class A, Spartan chasis, MM-2242, Cummins 330 pulling a 2014 Ford Focus.