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Our digital thermostat went blank. We have a model

Customer Question
Hi! Our digital thermostat...

Hi! Our digital thermostat went blank. We have a model CU5830-C175 Payne furnace. Code 33. I replaced a very dirty filter, manually hit the reset and the furnace worked, fan and flame. Goes through a cycle then again the thermostat goes blank.

Contractor's Assistant: Have you tried power cycling the appliance -- unplugging it and leaving it off for a few hours?

I have turned off the breaker for a minute or so.

Contractor's Assistant: Do you plan on doing the work yourself?

I will try! I have a smarter friend that might help me later in the day if necessary.

Contractor's Assistant: Anything else we should know to help you best?

I have electric space heaters ;-)

Submitted: 7 months ago.Category: HVAC
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Answered in 3 minutes by:
11/21/2017
HVAC Technician: airheatman, HVAC Technician replied 7 months ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 9,182
Experience: Furnace, A/C and heat pump specialist.
Verified

Can you give me the complete model number on the furnace?

The number on outside of furnace is just a series.

Actual model will be on a label on inside furnace panel just above burners.Remove panel to burner compartment and look inside. The model number will help me give accurate assistance for your specific unit.

Below is a link to a generic video showing where to find label with model number:

https://www.youtube.com/watch?v=KZfyeZOFdpU

If furnace is not coming on or does not stay on , there should be an error light flashing on the control board in blower compartment to indicate what has failed. If you can locate this and tell me the pattern of the flash, that will point us in the right direction for troubleshooting.

Also let me know if you have a multi meter for troubleshooting.WE will go from here.

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Customer reply replied 7 months ago
I do not have a multi meter. Model No.PG9MAA036080. light flashes 33 Limit circuit fault.
HVAC Technician: airheatman, HVAC Technician replied 7 months ago

Thanks. Now right now, do we have display and thermostat calling for heat?

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