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Old 02-29-2012, 03:09 AM   #1
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How to troubleshoot a bad sequencer with power off?


I think i have a bad sequencer because my heat blower will not cut off after i turn it off. So to troubleshoot it with power off, should i read 0volts ac with the power off because it should be in the open position when the blower is supposedly off? It might be stuck on i think.

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Old 02-29-2012, 04:20 AM   #2
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How to troubleshoot a bad sequencer with power off?


With the power off. You'll read 0 volts weather its good or bad.

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Old 02-29-2012, 07:29 AM   #3
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How to troubleshoot a bad sequencer with power off?


no power = no volts.

use an ohm meter and disconnect the wires on the terminal of the sequencer for the fan. if closed it will read 0 ohms if open then infinity. lots of the time when you bump or touch or move sequencers the switch will open. some brands of elec furnaces use a 24 or 240 volt fan relay so that may be the problem.
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