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Question About Honeywell Thermostat RTH7400D
I am installing the RTH7400D, all of the connectio...

I am installing the RTH7400D, all of the connections are straight forward but old unit has a W1 and W2 that are jumped together. The manual does not cover this but does say if Y1, W1 and W2 to call a qualified contractor.

Asked by Bill on 10/05/2014 1  Answer

ManualsOnline posted an answer 10 years, 1 month 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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