Trouble Shooting - Ventilation Fan
Is the mode | YES | Is 12 VDC | YES | ||||
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selection in the |
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| input of 1 |
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Gas position? |
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| amp fuse? |
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| NO |
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| NO |
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Set mode |
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| Correct 12 VDC |
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selection switch |
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| source to fuse. |
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to gas. |
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Disconnect red |
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| Disconnect red |
| YES |
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| wire from mode |
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wire from fan |
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| selection switch |
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to thermostat. |
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| to thermostat. |
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Is 12 VDC | YES | ||
present at | |||
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output of 1 |
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amp fuse? |
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| NO |
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Replace 1 amp fuse.
Is 12 VDC | YES |
present at 
fan thermostat?
Is 12 VDC | YES | |
present at | ||
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input of mode |
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selection switch? |
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NO |
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Correct 12 VDC |
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source to mode |
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selection switch. |
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Is 12 VDC |
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present at |
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output of mode |
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selection switch? |
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NO
NO
Connect the
two wires together.
Does fan operate?
NO
YES
Correct 12 VDC
source to fan
thermostat.
Replace
thermostat.
Replace mode
selection switch.
Replace
fan.
Specifications
DC Voltage: 12 VDC | Current Draw: .240 milliamps |
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