Hi, @Markall007!
Thank you for posting in the community. I'm sorry to hear your system isn't heating; I understand you need it working properly, especially with the low temperatures. I'd be glad to help!
To troubleshoot effectively, please answer the following questions:
- What type of thermostat do you have?
- Are you located in America or Europe?
- Is the Nest thermostat newly installed?
- When does the inconvenience start?
- When did the heating last work?
- When was the last time your HVAC received maintenance?
- Have you experienced extremely cold weather lately?
- Is it displaying any error code?
- Do you have an air conditioning system? If so, are the fan and AC running properly?
Additionally, please provide the following information:
- A picture of the current wiring configuration on your Nest Thermostat.
- A picture of the configuration on the Nest or Google Home app.
This information will help to determine the best next troubleshooting steps.
Thank you for your cooperation. I look forward to your response.
Best regards.
Ana
