Suburban SF-30F furnace won't turn on

Circuit board. Dinosaur fan 50 plus is a quality replacement board. A sail switch stuck is extremely rare, but may happen.

John&Joey wrote:

Chris is pretty much dead bang on, on his guesses. Sail switches do go bad and/or attract lint/dog hair/etc... stopping them from working.

Chris is also a pro, even owns his own RV repair business

Chris Bryant wrote:
A newer model will not start the blower if the sail switch is stuck closed.

Chris is pretty much dead bang on, on his guesses. Sail switches do go bad and/or attract lint/dog hair/etc... stopping them from working.

Does it "click" if you turn the thermostat off, wait, then back on.
If so, the click means the thermostat is probably working, if not, it might be bad.
If it does click, see the advise above

Suburban SF-30F Furnace Duo-therm thermostat No blower just click when it went off.

wildman55_98 wrote:
Ok my furnace on our 2008 Keystone Cougar 276 came on this morning started to heat up and then shut off after about 15 mins.andnow does not want to come back on.
Any ideas on what it is. Blower, control board or what?

Who knows.... furnace model, thermostat model, exact symptoms, much more details needed.

Ok my furnace on our 2008 Keystone Cougar 276 came on this morning started to heat up and then shut off after about 15 mins.andnow does not want to come back on.
Any ideas on what it is. Blower, control board or what?

Thank to all. Got it going again.

A newer model will not start the blower if the sail switch is stuck closed.

Don't know what year RV you have so........

Power comes from t-stat to either a stand alone 'time delay relay' OR a 'blower power' (time delay incorporated onto circuit board).
Power then goes to fan motor.......

Fan motor power is from DC Dist Panel FUSE and goes thru a switch/cb on furnace

Check for blown fuse on DC Dist Panel
Check for tripped switch/cb on furnace

If BOTH OK.........blower power module on circuit board bad. New circuit board