Nest stopped receiving power from Goodman Furnace

Old 01-01-17, 08:36 PM
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Exclamation Nest stopped receiving power from Goodman Furnace


Last night (New Years Eve) the Nest thermostat read "wiring report no power to Rh wire detected." This morning I took the doors of the Goodman GMS80603AXBC to check if the fuse had gone out on the furnace but it was fine. I then pushed the door button and the solid red might clicked on but no power was delivered to the thermostat. Next I took out the multimeter and out of the 5 wires (Yellow, Green, Blue, Red, White) I tested White and red, Green and red, and yellow and red but none of them delivered any volts.

I would really appreciate any help

Thank you!
Old 01-01-17, 08:54 PM
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Welcome to the forums.

A meter is an excellent tool and can help us here.

Check for 24vac on R and C. Is it there ?
That Goodman furnace should have a trouble LED. You should be able to see it thru a sight glass in the door. What is it blinking ?
Old 01-01-17, 09:04 PM
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Do you see a float switch under the furnace or evaporator coil?

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