system: 2heat/1 cool heat pump with auxillary heating existing thermostat TRADELINE mod~T874R subbase mod-W674L... I intalled new thermostat RTH8500 system works only on cool WHAT have i done wrong....TRADELINE TERMINALS ARE AS FOLLOWS R,A.X,Y,L,M,F,(VR-V JUMPER)

Asked by westmore on 09/25/2008 0  Answer

ManualsOnline posted an answer 16 years, 3 months ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

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