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View Full Version : White rodgers 50A50-230 Fan would not turn off

kb2
Jun 19, 2012, 01:02 PM
Hi,
I am new to this forum. I have an White Rodgers 50A50-230 control board. The issue I have is that the fan is not turning off even if the thermostat is set to off. Is there anything I could try or is changing the control board the only option?

Thanks,
KB
hvac1000
Jun 19, 2012, 02:25 PM
Hi,
I am new to this forum. I have an White Rodgers 50A50-230 control board. The issue I have is that the fan is not turning off even if the thermostat is set to off. Is there anything I could try or is changing the control board the only option?

Thanks,
KB

Just for the heck of it you might try a tap with the insulated end of a screw driver on the relays on the W/R control board and see if it knocks a stuck relay loose. If it does then you know it is a bad relay on the circuit board.