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Question

i have a carrier 48ss heat/air unit, the fan wont quit blowing and the heater will only blow cold air the red led is flashing 8 times can you help with a diagnosis?

Submitted: 321 days and 8 hours ago.

Category: HVAC

Value: $9

Status: AWAITING CUSTOMER ACTION

Answer

Hi, If the fan is running all the time you have an open limit switch. Under the electrical box where the burners are look for a little switch with a button on top this is the roll-out switch. This is my first guess.

Accepts:
Expert:	Robert
Pos. Feedback:	100.0 %
Answered:	1/6/2009

HVACR Educator

Licensed Mechanical Contractor, 30 years experience, 20 years teaching experience

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