topic Re: Draft Inducer Runs Continuously in Nest Thermostats

Draft Inducer Runs Continuously

Dave2 — Wed, 29 Sep 2021 14:56:52 GMT

I wired up the base plate without a C wire (the old thermostat did not have one). As soon as I plugged in the thermostat the draft inducer began running. After completing installation and configuration the DI was still running, even after turning the thermostat off. Only after disconnecting the White (call for heat) wire did the fan stop. The old thermostat has a jumper wire between RC and RH. I believe I have a single transformer heating/cooling system. Suggestions?

Re: Draft Inducer Runs Continuously

Jake — Thu, 28 Oct 2021 18:15:22 GMT

Hey Dave2,

I am sorry for the delayed reply. I wanted to follow up and ensure you are good to go. Please let me know if you have any questions from here, as I would be happy to take a closer look and assist you further.

Best regards,
Jake

Re: Draft Inducer Runs Continuously

Jake — Mon, 01 Nov 2021 19:13:08 GMT

Hey Dave2,

I want to ensure you are good to go, and everything is working properly. Please let me know if you are still having trouble, as I will be locking the thread in 24 hours due to inactivity.

Best regards,
Jake

Re: Draft Inducer Runs Continuously

Dave2 — Tue, 02 Nov 2021 01:32:43 GMT

Hi Jake,
Nope, still not working correctly after adding a C wire to the Nest Thermostat... How should I proceed?
Thanks,
Dave2

Re: Draft Inducer Runs Continuously

Jake — Fri, 12 Nov 2021 17:34:03 GMT

Hey Dave2,

I am sorry to hear you are still running into the issue. Do you mind me asking if you are able to send in a picture of your current wire set up for me to review? Please let me know once that has been sent, so I can review the system further.

Best regards,

Jake

Re: Draft Inducer Runs Continuously

Dave2 — Sat, 13 Nov 2021 17:47:38 GMT

Hi Jake,

Hope these pics help. The first shows the connection of the white with blue stripe wire (that is connected to the "C" terminal on the control board) connected to the blue wire (goes to the thermostat connection plate). The second pic shows the white with blue stripe connected to the furnace control board "C" terminal. The third pic shows the connections at the Nest connection plate with the blue wire connected to the "C" terminal. Note that the white wire is intentionally disconnected so the draft inducer fan does NOT run continuously (even with the thermostat mode set to OFF.

connection to blue "C" wireboard "C" wire connectionthermostat

Re: Draft Inducer Runs Continuously

Jake — Wed, 01 Dec 2021 18:40:45 GMT

Hey Dave2,

Thanks so much for reaching back out and providing the pictures for me to review. Taking a closer look, I am not showing why the system would run continually. Everything seems to be wired correctly on my end. I would recommend having a Nest Pro come out and take a closer look. They would be able to review the HVAC system, and find the main cause of the issue.

Sorry about that. Please let me know if you have any other questions from here.

Best regards,

Jake

Re: Draft Inducer Runs Continuously

Jake — Mon, 06 Dec 2021 23:01:17 GMT

Hey Dave2,

Please let me know if you are still having trouble, as I will be locking the thread in 24 hours due to inactivity.

Best regards,
Jake

Re: Draft Inducer Runs Continuously

Jake — Tue, 07 Dec 2021 19:09:04 GMT

Hey Dave2,

It has been a few days since the last reply, and I am going to lock the thread at this time. If you have any questions, please feel free to create a new post.

Best regards,
Jake