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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22543
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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I turned on My AC XL16i 4.0 it ran while then the err 79

Customer Question

I turned on My AC XL16i 4.0 it ran for a while then the err 79 came on with the red light on the tcont900ac43ua comm. programmable comfort control
JA: I'll do all I can to help. Tell me a bit more about what's going on so we can help you best.
Customer: Reorganized code 79
JA: Is there anything else important you think the HVAC Technician should know?
Customer: No
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the HVAC Technician about your situation and then connect you two.
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.


My name is Billy.

This is one you will need to call for service on. It is a low pressure alarm regarding the refrigerant. This means the unit is low on freon. The leak must be found, repaired and the unit recharged with freon.


Customer: replied 1 year ago.
Thanks Billy
Expert:  BillyHvac replied 1 year ago.

you are very welcome.

Just rate service and I will move off the active list.

I wish you the best.