Reznor ft75 garage heater wont ignite flashes 3 times

12-29-2012, 03:29 PM	#1
J GLASGO Newbie   Join Date: Dec 2012 Posts: 3	Reznor ft75 garage heater wont ignite flashes 3 times My Reznor ft75 wont fire up.It does not have a pilot light. It has a code that flashes 3 times.I tried jumping that part with no success. I know most of these have reset buttons,but i can not find it. It has been working great for years! Any ideas?

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12-29-2012, 03:50 PM	#2
J GLASGO Newbie   Join Date: Dec 2012 Posts: 3	Reznor ft75 garage heater wont ignite flashes 3 times the flashing lights are supposed to be a aproblem in the pressure switch,jumped it and it made no difference.

12-29-2012, 05:21 PM	#3
HVACTECH96 Member   Join Date: Oct 2012 Location: Lansing,MI Posts: 145	Reznor ft75 garage heater wont ignite flashes 3 times Any birds nest in venting?

12-30-2012, 10:22 AM	#4
Tator1076 HVAC Tech/ Browns Fan   Join Date: Dec 2009 Location: Dayton, ohio Posts: 539	Reznor ft75 garage heater wont ignite flashes 3 times Port on draft motor maybe plug if flute pipe is clear.

12-30-2012, 10:26 AM	#5
beenthere An old Tradesmen   Join Date: Oct 2008 Location: PA Posts: 18,635	Reznor ft75 garage heater wont ignite flashes 3 times Quote: Originally Posted by J GLASGO the flashing lights are supposed to be a aproblem in the pressure switch,jumped it and it made no difference. No its not suppose to be a problem in the pressure switch. It means there is a problem establishing proper draft through the furnace. As said earlier, check the flue pipe, pressure hoses and ports for obstructions.

12-30-2012, 10:30 AM	#6
Tator1076 HVAC Tech/ Browns Fan   Join Date: Dec 2009 Location: Dayton, ohio Posts: 539	Reznor ft75 garage heater wont ignite flashes 3 times Is the Draft motor even running?

12-30-2012, 01:04 PM	#7
J GLASGO Newbie   Join Date: Dec 2012 Posts: 3	Reznor ft75 garage heater wont ignite flashes 3 times You guys are good! The draft motor is moving very slow,barely actually. So it is not pulling vacuem to close the switch. Now i have to figure out where to get one.Thanks fellas!!