r/Nest • u/Sea_Sherbet_6755 • 1d ago
Generic install question
Pic 1 is old thermostat, pic 2 is the Nest 4th Gen.
I don't know much about HVAC, and I see conflicting information wherever I look.
I think it's: G -> G C -> C R -> Rh/Rc jumped W1 -> W1 Y -> Y1/Y2 jumped W2 -> W2 O -> OB
There are no jumpers on the old thermostat.
Most articles say no need to use a jumper on the Nest I know, but I'm not sure here.
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u/Maleficent-Clock8109 1d ago
No need for jumpers, r to rc. Y to y1. O to o/b Everything else is straight forward.
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u/Expensive-Heart3299 1d ago
You can connect the wires to the nest thermostat the way it is on the old thermostat. the nest thermostat has a built in jumper so you won't need to add one. On the nest you can connect the "R" wire to either RC or RH it doesn't matter.