SAIL SWITCH VOLTAGE CHECK
Hoping for help on troubleshooting a Furnace Sail Switch. Furnace was intermittently failing and now progressively worse. Blower would come on and after about 30 seconds would shut off - no audible at...
Forum Discussion
When Sail Switch is OPEN should be ZERO DC Voltages on output side (to Limit Switch)
Sail Switch is a 'micro switch' and do fail, hang up, get dirty etc
Atwood AFS wiring on pg 7
Fan starts then shuts down 30 seconds later......W/O any attempt at ignition?
After start of fan.....
15-17 second purge cycle
Then Circuit board should be sending DC to gas valve and spark electrode for ignition
No attempt at ignition ...circuit board shuts fan off
Sounds like Circuit Board issue
See pg 30 for Sequence (AF Models have the use circuit boards with blower relay/control incorporated on circuit board)
ANY Error Codes.....Blinking light on circuit board??
Sail Switch is a 'micro switch' and do fail, hang up, get dirty etc
Atwood AFS wiring on pg 7
Fan starts then shuts down 30 seconds later......W/O any attempt at ignition?
After start of fan.....
15-17 second purge cycle
Then Circuit board should be sending DC to gas valve and spark electrode for ignition
No attempt at ignition ...circuit board shuts fan off
Sounds like Circuit Board issue
See pg 30 for Sequence (AF Models have the use circuit boards with blower relay/control incorporated on circuit board)
ANY Error Codes.....Blinking light on circuit board??
