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Randy, HVAC Technician
Category: HVAC
Satisfied Customers: 36
Experience:  25+ years in the Field of HVAC, Electrical, and Plumbing. Commercial, Institutional and Residential.
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flashing fast red light on my trane xr80 furnace,is that normal,or

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flashing fast red light on my trane xr80 furnace,is that normal,or is there some wrong.I still have heat in my house,but I never noticed the flashing red light.
Is the red light you see in a small round peephole?
Customer: replied 7 years ago.
yes it is,I checked my manual,and found under integrated furnace control error flash codes that continuos flashing normal-call for heat.what does that mean?
You saw that different codes indicates different modes, even trouble codes. If it is a single, constant flash, it is either running in heat mode, or it is getting ready to fire up. Heat demand or a call for heat is when the thermostat sends a signal to the furnace to come on.
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