ultra high efficiency Heil propane furnace won't light

[DonaldB]

My 11 year old Heil ultra high efficiency furnace main burner won't ignite, It has a closed in pilot burner area so I can't see what is happening. The exhaust fan starts and I hear a " click" and the pilot glows orange thru the peep hole for several seconds but the main burner doesn't light. I can get at things if I take off the 6" x 12" tin plate. The pilot and end of the gas tube for the pilot is held on by 3 metal screws and the other end of the gas line to the pilot has a nut to hold it into the side of the gas valve unit. Should I pull this out and look it over? One fellow suggested I try and light the main burner with a match on a piece of clothes hanger wire thru the tiny peep hole but it didn't sound very safe. Plus You can't see harldy anything thru the peep hole. Any suggestions? Donaldb

[HayZee518]

good advice not to light the burner with a match. propane is heavier than nat gas and settles to ground level. any spark other than the igniter will cause a poof and may burn off your eyebrows. check the venturi for spider's nest or other obstruction. check the flame sense on the pilot

[DonaldB]

Burner won't light

OK, I'll remove the pilot and venturi unit if I have to, and check for spider webs. How do I check to see if the sensor is working? It does glow orange for 10-15 seconds. Donaldb

[HayZee518]

if the thing glows then it shouldn't be a problem. there's a built in time delay before the pilot or burner kicks in.

[DonaldB]

What do I do next?

It glows for 10-15 seconds but the main burner doesn't light. That is problem. I took the igniter loose and bent the aluminum pilot tube so I could get a look at it. It is like nothing I have ever seen before. I'll attach a picture of it. Should I bend one of the little rods to make it light easier? Or would that not help? Any ideas? Donaldb