Hello,

Everything was working fine and then today my heater is blowing cold air.
I have Carrier Model: 48SX-036080321AA and not sure yet, if there is any error lights on the electronic board, as my unit is in top of my 2 story home and the roof is little ice as is around 28'f this morning here.

So any advice on this matter? What could be the problem?

Few pictures of my unit see bellow.

Thanks for any advice!4800548006480074800848009

Hmm, I see no error light codes, and now it works. Not sure what happen! Maybe is related to the heater boiler ? Or is there a filter to replace at a/c heating unit?

Boiler? Looks like forced air to me. Filter is probably in the central return .

Also from your picture the contact tips look burned. You might want to clean them if enough tip is left or just replace them. Also is your ignitor clean?

When you had the problem was there any sound coming from the unit like a clicking sound while it was running ?

Boiler? Looks like forced air to me. Filter is probably in the central return .
Hello,

I mean water heater in the garage.
And first picture with that condenser fan running is not from today! Forgot to mention.So that fan was off,when this happen.
The filters I have one on second level and one filter down stairs.

Thank you.


Also from your picture the contact tips look burned. You might want to clean them if enough tip is left or just replace them. Also is your ignitor clean?

When you had the problem was there any sound coming from the unit like a clicking sound while it was running ?

Hello, and thank you for advice.

Can you point me what tips look burned?

See attached picture.

Not sure exactly witch one is the igniter... And no clicking heard.

Thank you,

The tips are on the contactor. They are seen in the picture with a yellow and a black wire connected to them.

rh upper corner.