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I have a carrier split system model no. 38ydb024310 &

Customer Question
fe4anf002. Just replaced the thermostat...
I have a carrier split system model no. 38ydb024310 & fe4anf002. Just replaced the thermostat with the infinity touch control. Getting error message 'outdoor unit has wrong size for indoor unit. 16kbtu found. 18kbtu min'. Why am I getting this message? It worked before.
Submitted: 6 months ago.Category: HVAC
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Answered in 10 hours by:
12/4/2017
HVAC Technician: Phil, Mechanical Engineer replied 6 months ago
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 7,426
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello, I am having trouble getting the manual on that unit, however if its an older unit, with wire terminals on the thermostat R,Y, W, G, and C and maybe a few others.... the infinity thermostat will not operate on that system as a rule.... tell me what wire terminal letters are on the infinity thermostat, we can go from there.

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Customer reply replied 6 months ago
The terminals are ABCD. The thermostat (systxccitn01-a) installed is the replacement for the original systxccuid01-a. I installed the new one like the old one.
HVAC Technician: Phil, Mechanical Engineer replied 6 months ago

Hello, In that case the problem is with the furnace/air handler infinity system itself... there are flash code LED's on the printed circuit board and a legend next to or on the wiring diagram telling us what the flash code means.

Look for that, tell me what you find.

Meantime I tried the model number you gave and its not computing, could you double check those and tell me exactly where you got the number. such as "on the air handler that also has the serial number and amperage draw on it"

About how hold is that system? that is relative because some changes have obsoleted some of currently available options.

We can go from there

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HVAC Technician: Phil, Mechanical Engineer replied 6 months ago

Thanks, ***** ***** to take a local Carrier dealer with a well educated tech staff to sort that out for you....meantime I will opt out so that any other experts here who think they can help can see your question

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Customer reply replied 6 months ago
Thank you for all your efforts.
HVAC Technician: Regan Land, HVAC Technician replied 6 months ago
Regan Land
Regan Land, HVAC Technician
Category: HVAC
Satisfied Customers: 768
Experience: Over 20 years of experience, NATE Certified, Licensed HVAC Contractor, Certified IAQ Specialist
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Hi, my name is ***** ***** I'll be assisting you with your question. I apologize for the extended wait time you experienced, I've only just come online now and would like to assist you with your question if you still need help. Can you please let me know if you still need help with your question?

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