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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I jabe a carrier 80 furnace that is humming when it is on

Customer Question

Hi, i jabe a carrier 80 furnace that is humming when it is on heat but it is not producing heat or any air. However, the air blows when i put it on fan. Can you help me?
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

Remove panel in front of burners and look for a label on inside(usually right hand side) and give me the model on the furnace.

Then look on control board in blower compartment and see if we have a blinking light to indicate what has failed.If so, tell me the flash pattern of the light.

Customer: replied 1 year ago.
Hi it is 58DLA090---12114.
Expert:  airheatman replied 1 year ago.

Lets do this, Using a jumper or a pair of needle nose pliers, jump R to W on furnace board and see if furnace will come on. (Keep in mind door switch will have to be held in to have power to furnace while doing this.