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airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8387
Experience:  Furnace, A/C and heat pump specialist.
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We have a M3rl Nordyne furnace in a mobile home installed

Customer Question

We have a M3rl Nordyne furnace in a mobile home installed 2008. The furnace was running, then the burnerthe blower kept running and wouldn't shut off. The furnace has one red flash and only way to shut off the furnace from running was to shut the switch off. Can you tell me what may be wrong with the furnace?
Thank you
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

Sounds like you probably have a bad control board. First of all, as you know the 1 flash code implies we have an open limit. Secondly board should kill power to the gas valve if we have any type of failure such as open limit or pressure switch