Old Jameson thermostat has a switch that slides to C or H


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Old 07-20-14, 07:23 PM
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Old Jameson thermostat has a switch that slides to C or H

We have a very old Jameson thermostat, that has a switch on the inside panel that shows one side as C and one side as H. I can not find a user manual anywhere online and I am wondering, what could the C and H stand for and what setting should we be using in cooling mode. I took a photo if it helps, attached.
 
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Old 07-20-14, 07:51 PM
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It determines if your reversing valve is energized to heat or energized to cool.

If the O/B terminal is B it is energized to heat. (Rheem, Ruud, Weatherking)

If the O/B terminal is O it is energized to cool. (Almost every other brand of heat pump)
 
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Old 07-20-14, 08:17 PM
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It is a Rheem unit and the O/B is connected with a blue wire and assuming since it is a Rheem unit the switch needs to be set on H, correct?
 

Last edited by sotas2; 07-20-14 at 08:55 PM.
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Old 07-20-14, 09:09 PM
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Yes, your switch should be set to H for a Rheem heat pump.
 
 

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