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Old 10-12-2008, 01:46 PM  
ufatbasted
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Default Thermostat wire codes do not match

Hello

I'm attempting to install a Honeywell programable thrmostat to replace my old mercury white rogers t stat.


When I pull the old T stat it has 4 wires coded as follows
TC
T
RH
W.


The new thermostat mentions RH and W wires but I'm nit sure what the T1 and T wires are for. My guess is a timer as the old TStat had a timer and did not use batteries. I'm tempted to just cap them and go on with the install.

Anyone have any ideas?


Thanks



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Old 10-12-2008, 08:03 PM  
speedy petey
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If this is just "heat only" you are correct. Use RH and W and cap off the others.

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Old 10-12-2008, 08:23 PM  
ufatbasted
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It is heat only. I capped them right after I posted and got the new tstat working

Thanks for the info

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