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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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My blower motor is staying on but I got no heat, Trying to

Customer Question

My blower motor is staying on but I got no heat
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: Trying to find a reset button. It's a frigidaire furnace FG61C 080C-V8
JA: Do you plan on doing the work yourself?
Customer: Yes I did
JA: Anything else we should know to help you best?
Customer: Cycled power. Left off for 5min then turned on, checked flame sensor and made sure it was clean
Submitted: 1 month ago.
Category: HVAC
Expert:  BillyHvac replied 1 month ago.
Hello,My name is Billy. On the circuit board is a many times is it blinking?
Customer: replied 1 month ago.
Blinks twice
Expert:  BillyHvac replied 1 month ago.

Thank the exhaust fan running?

Customer: replied 1 month ago.
the it's the exhaust fan that is running not the air intake
Expert:  BillyHvac replied 1 month ago.


The code is saying that the air created by the exhaust fan is not closing a pressure/air switch.

Most common issue is blockage in vent pipe.

Next is small rubber tube is cracked or plugged

Then the fitting on the furnace the tube attaches needs to be poked clear.

Basically we are not getting suction on the tube (like a straw) to close this air switch. Do you know where the pressure switch is?

Customer: replied 1 month ago.
I'll have a look. I do see the tubes
Customer: replied 1 month ago.
Nope not sure what the pressure switch looks like
Expert:  BillyHvac replied 1 month ago.


depending on if your furnace blows up, down or sideways...The pressure switch is near the exhaust fan and has a rubber tube as thick as a pencil to it.

see HERE

Customer: replied 1 month ago.
I looked it up, I found 2 switches with tubes. I diconected and checked all the tubes and they were clear
Expert:  BillyHvac replied 1 month ago.

are your pipes to the outside clear? you can use a shop vac if needed

Customer: replied 1 month ago.
I went outside and they appear to be clear. I guess the other option is to pull it off the furnace and see if it's clear going up to the outside
Expert:  BillyHvac replied 1 month ago.
Correct. Do you have one or two that go outside?
Customer: replied 1 month ago.
Just one. I disconnected the vent, turned power off for 5 and then turned on again. With it venting directly in the basement the alarm still won't clear and the furnace will not lite
Expert:  BillyHvac replied 1 month ago.
Ok this puts it down to plugged drain or bad pressure switch. Can use a shop vac and clear the furnace drain?
Customer: replied 1 month ago.
the drain was full of water. I got the water out and tried running the furnace but with no luck and the light is still flashing twice every 5sec
Expert:  BillyHvac replied 1 month ago.

if drain was filled we may have water logged switches...remove the tube from that goes to pressure switches from the furnace side...leave attached to switch. Then gently blow and draw from the pressure switch through the tube (like a straw)..tell me if you here small clicks from switch as you do this.

Customer: replied 1 month ago.
I've done that already and got nothing
Expert:  BillyHvac replied 1 month ago.

Tell me what happens when:

Turn thermostat to off or turn temp down to where there is no call for heat.

Turn power off and back on to furnace.

Does the light stay solid?

Turn heat on....when does the light start blinking?

Does the exhaust fan blow good amount of air out when running?