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Carrier 58MXB - replace solenoid, fried my furnace?

5 posts in this topic

I replaced the solenoid valve to the humidifier. I neglected to turn the power off to the furnace. While replacing the solenoid, I may have touched the controlling wires together or to the duct - I saw a small spark at one point. Now the furnace does not operate at all. Any ideas on what I might look at? Thanks.

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Need appliance parts? Call 877-803-7957 now!

You probably blew the control fuse. At the furnace circuit board look for a 3 or 5 amp automotive type fuse plugged into the circuit board.

Simply replace the blown fuse.

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I did find a fuse on the board that looks to be blown and shows open on my ohm meter. The fuse is purple and is only labeled "E". How do I know if this is a 3 amp or 5 amp fuse?

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nevermind - I was holding it backwards. It's a 3, not an E. Two dumb moves in one morning.

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