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BillyHvac
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22091
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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I'm Paul. My heater doesn't switch on in the morning it

Customer Question

Hi, I'm Paul. My heater doesn't switch on in the morning it has -07 on the screen I turn it off then back on and it works what the problem
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.
hello,
in order to determine this I will need model number.
Could you get that and respond with reply button please
Customer: replied 1 year ago.
M/n is TH420NG
Expert:  BillyHvac replied 1 year ago.
Thank you.
this is a failed ignition code.
Options:
dirty flame sense assembly
low gas pressure
flame not getting to sensor
The sensor must record flame is present in 3 seconds or it shuts down. If you are handy you can access ignitor and clean with steel wool