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Control Board Transformer Voltage

Mirage's Avatar

Join Date: Feb 2018
Posts: 5

02-09-18, 05:57 PM   #1 (permalink)  
Control Board Transformer Voltage

I have a furnace having issues and I noticed my Transformer is reading 29.5V output. The Schematic says it should be 24V. Is this a serious problem? Is too much Voltage a bad thing or can my furnace handle it just fine?
I'm thinking maybe the transformer is defective and it's outputting too much Voltage, and not enough current to 'drive' the rest of the circuit.

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PJmax's Avatar
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Join Date: Oct 2012
Posts: 41,331

02-09-18, 06:05 PM   #2 (permalink)  
That is ok. Your furnace board can handle that voltage.
For the most part.... higher wattage transformers run at slightly higher voltages.

If you check the voltage under operation.... it should come down some.

~ Pete ~

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