Need help wiring the White-Rodgers thermostats the Lennox Heating and Air Condiontiong that has 5 colour cables, B/W/R/O/G. I have the white-rodgers thermostats installed, the Furnace heating and Fan work as expected, but when switch to A/C, nothing happens, heard two click after switching to A/C. I'm very appreciated your help!

Do the install instructions call for a jumper from rh to rc.if so do you have one?

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Originally Posted by wmproop

do the install instructions call for a jumper from rh to rc.if so do you have one??

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Got it work now. The previous owner removed the switch located in the little grey box beside the A/C unit before last winter. The thermostats wiring works fine.

Thanks for your answer.