jamesvinton Report post Posted January 2, 2015 The furnace blower kicks on and then goes out. Share this post Link to post Share on other sites
rlbarkleyii Report post Posted January 2, 2015 Sounds like sail switch may not be closing. That would be the first thing to check. The air movement from the fan blows the sail switch paddle and closes a circuit which then allows the opening of the gas valve and ignition. Often mud wasps or other debris prevent the sail switch from operating properly. Clean the exhaust tube and air intake tube by removing outside cover. Check for movement of sail. Can be prevented by use of screen cover. Share this post Link to post Share on other sites
wolfe10 Report post Posted January 2, 2015 Yes, a non-closing sail switch will allow the fan to come on, but not for the gas valve to open or igniter to work. But, there are number of reasons for a sail switch to not close in addition to a bad sail switch: Low voltage is #1-- fan spins too slowly to generate sufficient CFM. Blockage in either the return or outflow side (say, for example, you closed a couple of vents). Bad connection at the PC board-- often "cured" by removing the connection and using a good electric cleaner. De-oxit makes some excellent products for this. Share this post Link to post Share on other sites
billbaldwin Report post Posted January 2, 2015 Check your propane....... If the burrner does't lite the fan will run for a while and the shut off Bill Share this post Link to post Share on other sites
