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Originally Posted by btuhack

I have a "friend" that has done that more than once.

LOL... ok, some people need to do it more then once to learn their lesson.

Myself, once was more then enough.

Originally Posted by beenthere

Thats something you generally only forget to do once.

I have a "friend" that has done that more than once.

Originally Posted by beenthere

Thats something you generally only forget to do once.

I've only done it once. That was enough. "Why do I smell gas?" ... "Oh. darn!"

"Reminder to self ..."

"Replace plug before firing furnace up!!!"

Originally Posted by gravity

these are the important things to right down in my little book...lol

this one will go next to the line that saids "dont forget to put plug back in gas valve after checking propane pressure".....imagine what happened next.

Thats something you generally only forget to do once.

You are probably right

Originally Posted by gravity

i believe the 50-60 is 3 burners. usually 20k per burner. i would say it was a 40,000.

You know, now that you mention it, you are probably right. This was in the attic furnace. He had 2 systems, so he most likely had a 40k + 40k.

i believe the 50-60 is 3 burners. usually 20k per burner. i would say it was a 40,000.

Originally Posted by gravity

really!? thats strange. what make and model furnace would it not work with?

Don't remember the Model#, but it was a Payne. All I remember it had 2 venturi tubes 50-60k most likely.

these are the important things to right down in my little book...lol

this one will go next to the line that saids "dont forget to put plug back in gas valve after checking propane pressure".....imagine what happened next.

really!? thats strange. what make and model furnace would it not work with?

Originally Posted by gravity

i have also had weak HSI that wasnt hot enough to ignite the fuel. i have also had them that go out right before the gas valve opens.

Thats exactly what was happening to me.

Need to get an OEM. Universal would not work.

i have also had weak HSI that wasnt hot enough to ignite the fuel. i have also had them that go out right before the gas valve opens.

Had the exact same problem ...

I had the exact same problem on a Payne about 3 months ago. Don't remember the Model#.

Anyway, change the Hot Surface Igniter (HSI). What was happening for me was that the glow on the HSI would go out before the gas valve would open, hence no ignition. Replaced the HSI and all worked fine. No call back in 3 months.

Hope that works for you.

Originally Posted by landolb

Just recently went to a gas furnace training for carrier, and they gave us a story on that. the guy had took the manifold out and hooked it up to a water hose to check if all the water was coming out evenly on each orifice. never heard this method before but sounds like another way of checking a clogged manifold or orifices...
..

Leave it to a training center to come up with this scheme. I have no doubt it would work but yikes!

Just recently went to a gas furnace training for carrier, and they gave us a story on that. the guy had took the manifold out and hooked it up to a water hose to check if all the water was coming out evenly on each orifice. never heard this method before but sounds like another way of checking a clogged manifold or orifices...
..

I had this same problem on a pg8 a couple years ago, i ended up moving the HSI a little closer at a slight angle to the burner and it started lighting perfectly. To reason with it i figured vibration might have moved the bracket

Ran fine with what has been there for 6 years.... and now there is a need for change in design?

Could it be that this thing is on crack? as in?

could the space be in a negative pressure????????

is your venting negative??

looks like you covered everything?? maybe venting or combustion air????

Inspect your manifold and or burner alignment. This problem can occur if it is off, usually the Z axis.

OEM gasvalve = good
I agree, check the orifices for bugs/spider web or something ?
Please clean the burners with water and blow out with nitregen.
Check the crossovers with a piece of sheetmetal 1/4 x 4".
luck dan

board problem

I usually find the control board is cutting off ignition too soon b4 the the valve opens.
There needs to be reasonable overlap between gas and lighting device.
4 seconds anyway...
Never had the valve the issue, sure lots of bugs and rust mess with the
crossovers. I often orally blow out the burners with a 3 ft hose, replaced
bad ones[burners] and found removing and washing with hot water/soap
really helps too..
Usually there is more than one way to resolve most problems