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I have trane xb furnace. I'm not getting any trouble code…

Customer Question
I have trane xb...

I have trane xb furnace. I'm not getting any trouble code lights on. No light at all. I have checked for power to the circuit board and I have 122 to the board.

Contractor's Assistant: Did you check the furnace's filters?

Just replaced the furnace filter and the high limit switch

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

Yes

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

Unit looks clean, but nothing else I can see

Submitted: 4 months ago.Category: HVAC
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Answered in 1 hour by:
11/24/2017
HVAC Technician: gotoman for ac, HVAC Technician replied 4 months ago
gotoman for ac
gotoman for ac, HVAC Technician
Category: HVAC
Satisfied Customers: 5,312
Experience: 51 years of experience install design and repair of all makes and models of AC
Verified

Check power between R and C/B on furnace board to see if you have 24 volts. If not check the fuse on the board. It is a 3 or 5 amp auto type fuse. Russ

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Customer reply replied 4 months ago
Not getting any voltage there and there is no fuse on the board. Already called a tech to come by and look at it.
HVAC Technician: gotoman for ac, HVAC Technician replied 4 months ago

Ok. If no fuse inline sounds like bad transformer. Let me know please. Russ

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Customer reply replied 4 months ago
Transformer and board where bad.
HVAC Technician: gotoman for ac, HVAC Technician replied 4 months ago

Must have had a power surge to get board and transformer. Hope the tech installed a fuse on transformer. Russ Glad you are back online.

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Phil, Mechanical Engineer
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