Blower turns on for 8-10 turns off then back on with heat

[shamrock70]

Just installed Nest learning thermostat. My system is forced air heat and a/c with humidifier. Since install of nest , when heat is called blower starts and runs for about 8-10 seconds then turns off. Then about 10 seconds after that the the blower turns back on with the heat. Wasn’t like this prior to nest install.

[sporfrog]

Let's start with verifying your wiring. Do you have a photo of the wire connections from the old thermostat? If so reply and attach both the old thermostat wiring and the wiring with the Nest. 

[shamrock70]

My original nest stopped working, so I temporarily installed a basic tstat until I purchased a new nest. The wiring on the new nest is the same as the old one. The new nest stat is working aside from the fact that the furnace blower starts for 8-10 seconds, stops and then starts again until temperature is reached.

[Ryan_G]

Hey folks,

Thanks for reaching out and I'm sorry for the delay.

@sporfrog, thanks for your help.

Could you go to your Nest Thermostat settings > equipment then select the right heat type and heat source for your HVAC unit. This sometimes is the reason why your system is acting up. 

Also, check your wiring, if possible, try to re-strip them to expose new copper wire.

Let me know how it goes by replying to this thread.

Regards,

Ryan

[Jeanmarie]

Good morning!

The same thing is happening to our air unit. Heat works fine. testing the air. it kicks on then shuts right off. nest shows a 2 or 2.5 min delay then it does it again.

Thank you,

Jean marie

[Ryan_G]

Hey folks,

I just wanted to follow up and see if you're still in need of help? Please let me know, as I would be happy to answer any questions you may have.

Best regards,

Ryan

[ajberritto]

Move the * (blue wire) to C. 

[Ryan_G]

Hey folks,

Thanks for visiting the Google Nest Community. 

Since this thread hasn't had activity in a while, we're going to close it to keep content fresh.

If you have additional questions, feel free to submit another post and provide as many details as possible so that others can lend a hand. 

Hope this helps!

Kind regards,

Ryan