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Ask Gaztech Your Own Question
Gaztech, HVAC Technician
Category: HVAC
Satisfied Customers: 484
Experience:  Owner at Gaztech
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My carrier model 58 furnace (just purchased home -

Customer Question

Hi! My carrier model 58 furnace (just purchased home - forclosure, had been sitting more than 2 years.... I am just firing it up. I get code 23 when I turn the heat on. I checked the pressure lines.... whats next? Anything more common to happen when its been sitting unused that long?
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: yes turned temp 70, 80+. Fan auto and on. filters are month old
JA: Do you plan on doing the work yourself?
Customer: for now, yes. I took the pressure valve off... I could hear it open when I blew into it. It does open
JA: Anything else we should know to help you best?
Customer: When running the AC, it always seemed loud (we only used it a couple weeks). When on (fan on or auto) it was always running/loud.
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.


My name is ***** ***** I will do my best to assist you. I am looking over your question now and will respond shortly.

Expert:  BillyHvac replied 1 year ago.

do you know what the pressure switch is? I can post drawing if needed

Customer: replied 1 year ago.
FYI.... I am not by the unit at the moment. No internet available there.
Expert:  BillyHvac replied 1 year ago.

I understand....are you sure it was not a 32 code?

Customer: replied 1 year ago.
I believe so. But send it anyway. It was a double
Customer: replied 1 year ago.
Code 23... pressure switch did not open
Expert:  Gaztech replied 1 year ago.

1- You will need to check your exhaust and intake pipes for obstruction,

2-check to see if there is a water build up in your condensate tubing

3-check power venter fan for proper operation

Expert:  Gaztech replied 1 year ago.

Did you fix the problem?