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Nest Thermostat

FrozenGoat
Community Member

Hello All,

I installed my Nest thermostat last fall and it's worked perfectly. Now that summer is upon us, when the AC turns on, it runs for approximately 2 minutes and then the furnace fan motor shuts down and then continually tries to start again for a split second each time. All the while the the AC unit outside is still running. I tried installing a jumper between RH & RC with no luck. I reinstalled my old thermostat which has the jumper between RH & RC and the AC works perfectly so it's definitely an issue with either the thermostat or a compatibility problem with either the wiring or heating/cooling equipment.

My wiring is W1 White,  Y1 Yellow,  G Blue, RH Red. When I connect the thermostat it senses both the heating and cooling.

Any suggestions?

1 ACCEPTED SOLUTION

FrozenGoat
Community Member

Well, I solved my problem. Surprisingly without using any of the amazing knowledge and insight from DarlaBaker's spam message above... 🙄 I have a tip for you regarding what you can do with the trees you remove. 🙊

It turns out the answer, as it appears to be with most of the issues with the Nest is the missing C wire. I ran the wire and sure enough the problem with the fan went away. I thought it wasn't the C wire issue because the condenser continued to run and only the furnace fan cycled but there you go. When in doubt, run a C wire.

 

View solution in original post

3 REPLIES 3

FrozenGoat
Community Member

Well, I solved my problem. Surprisingly without using any of the amazing knowledge and insight from DarlaBaker's spam message above... 🙄 I have a tip for you regarding what you can do with the trees you remove. 🙊

It turns out the answer, as it appears to be with most of the issues with the Nest is the missing C wire. I ran the wire and sure enough the problem with the fan went away. I thought it wasn't the C wire issue because the condenser continued to run and only the furnace fan cycled but there you go. When in doubt, run a C wire.

 

MelbaDT
Community Specialist
Community Specialist

Hey FrozenGoat, 

 

Thanks for posting and for keeping us in the loop on what you've done to resolve your concern. I'm glad to hear that you've figured out a fix and now you have a Nest thermostat that is working as it should — give yourself a pat on the back for a job well done!

 

Cheers, 

Melba

MelbaDT
Community Specialist
Community Specialist

Hi, 

 

We haven't heard from you in a while so we'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the Community.

 

Best, 

Melba