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Old 09-02-2014, 08:39 PM   #1
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Coleman Mach problem

I believe I have a Coleman Mach Analog thermostat problem. The furnace or air conditioner seem to work properly when the fan slide is in the auto position. However nothing happens when the slide is moved to either of the Hi Lo settings. Is this normal? Does anyone know where instructions for this thermostat can be found? Thanks
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Old 09-03-2014, 03:25 PM   #2
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Doesn't sound right to me, you can get the manual here:

http://rvcomfort.com/rvp/pdf_documents/1976190.pdf

And service manual

http://rvcomfort.com/rvp/pdf_documents/1976376.pdf
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Old 09-03-2014, 03:31 PM   #3
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What happens with the fan in the on position and you move the "HI/LOW" switch?
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Old 09-03-2014, 06:46 PM   #4
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Thanks nylyon. At first glance it looks like my switch is working as designed. I had hoped that I could try running the fan constantly at low speed while in heat mode to try and improve the heat distribution throughout the RV. Looks like that is not possible. I will look over the manuals more closely.

Grumpy, I believe that just the AC fan comes on high with no difference in speed while I move the slide. I will double check though if it is giving you a clue. Thanks for your help.
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