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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have the code 12 while just turn on blower running only

Customer Question

I have the code 12 while just turn on blower running only for 5 minutes. Blower stop red light stay solid for 30second then flashing code 31?
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: I havent turn on the heat the whole summer at least.
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: yes and yes
JA: Do you plan on doing the work yourself?
Customer: yeah if you can tell me what to do?
JA: Anything else we should know to help you best?
Customer: not really
Submitted: 23 days ago.
Category: HVAC
Expert:  Technician HVAC replied 23 days ago.

Good evening, Im a expert here on Just answers and ready to help, Im active usually every evening and throughout day I am active in the field so Im limited.

Lets get started on your question, At the end please be sure to rate me I strive a positive rating as this is the only way I get paid.

So is this happening only when you turn on Heat ?

Expert:  Technician HVAC replied 23 days ago.

If you can also provide me your model number and make that would be fantastic, If its a lennox please also provide Serial!

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