Hvac

fabricator · 10-24-2008, 06:49 PM

Who is the heat and air guru
I have a rheem classic 90 about 4 years old
started in the spring thought it was low on propane
but is still doing it this fall
will cycle and heat like it should then cycle off
next time it will cycle blower will kick on
cycle back off b/4 it should, kinda like it runs out o propane ?
will cycle on off on off on off several times
without lighting, will go in shutdown mode... I guess is what it would be called
10- 15 minutes later will go thru the same ****
sometimes it will light and run sometimes it wont

thermostat cause this?
HELP..

wilson1010 · 10-24-2008, 07:21 PM

thermocouple

JeffK5 · 10-24-2008, 07:25 PM

Quote:

Originally Posted by wilson1010

thermocouple

Bingo!

Had my NG furnace do the same thing ....

fabricator · 10-24-2008, 09:04 PM

thremowho?
these hard to replace ?
where to buy?
guess i need model # and name of furnace
cost much?

itbrokeagain · 10-25-2008, 12:34 AM

616 5750 Mike sawyer.

carwash · 10-25-2008, 12:50 AM

same thing happened to ours this past spring to end the season. replaced the whole thing... not sure if the thermocouple is hard or expensive, we just needed a new furnace and didnt want to dump any money into the old one.

fabricator · 10-29-2008, 03:45 PM

yep, seems to still be still working
the way it should

fabricator · 11-09-2008, 12:35 AM

furnace isn't fixed, it is just messin with my head
well at least it's not periodic, doesn't work at all now
took what appears to be the flame sensor out
sanded, put it back in.
has LED's... flashes 4 times then starts what i think is a new cycle
doesn't even get to the ignition stage at all
pressure switch maybe.
looks like the yellow pages on this
not sure what else to do here
Called the # above but hate 2 keep aggrivating to guy
is a far drive for him

itbrokeagain · 11-09-2008, 12:19 PM

Hmmmm I thought he lived around here.

fabricator · 11-09-2008, 05:41 PM

said he lived in harrison
jacked with the pressure switch
seems to be working, getting correct volts anyway
started jacking with thermostat and it started working again

yellowjacket · 11-10-2008, 04:46 PM

hvac dude here. back of your furnace doooor should have a chart what those codes mean. if it is your pressure switch not making, check 2 things. when your furnace is tying to light but failing, take your front combustion air (burner) door off. if it lights now, that means youve got a restiction in the intake pipe. leave, birds nest, ect. dosent light? try to clean your trap. if your furnace is a 90% or more, youll have tubes going down from below the inducer motor to a cannister(trap) before out to the drain. take it off and flush it in the sink. make sure you have it primed with water upon reinstall. hope it helps, rob. ive got to pm you about some other stuff, anyway. rob

10-24-2008, 06:49 PM	#1
fabricator Join Date: Jan 2007 Location: Cincy, Oh Posts: 947	Hvac Who is the heat and air guru I have a rheem classic 90 about 4 years old started in the spring thought it was low on propane but is still doing it this fall will cycle and heat like it should then cycle off next time it will cycle blower will kick on cycle back off b/4 it should, kinda like it runs out o propane ? will cycle on off on off on off several times without lighting, will go in shutdown mode... I guess is what it would be called 10- 15 minutes later will go thru the same **** sometimes it will light and run sometimes it wont thermostat cause this? HELP.. __________________ For you guys who can't drive, I have owned a frame rack for several years. Prices are based on your skill and ability to wreck it....

10-24-2008, 07:21 PM	#2
wilson1010 Join Date: Feb 2007 Posts: 147	thermocouple __________________ Unimog 406 XJ with a bunch of stuff put on by somebody else

10-24-2008, 09:04 PM	#4
fabricator Join Date: Jan 2007 Location: Cincy, Oh Posts: 947	thremowho? these hard to replace ? where to buy? guess i need model # and name of furnace cost much? __________________ For you guys who can't drive, I have owned a frame rack for several years. Prices are based on your skill and ability to wreck it....

10-25-2008, 12:34 AM	#5
itbrokeagain Just Empty Every Pocket - CORE Member - Join Date: Feb 2007 Location: Amelia Posts: 1,435	616 5750 Mike sawyer. __________________ 91 fj 80 on 37 Nitto Muds with a 10k winch. Cage and sliders coming soon.

10-25-2008, 12:50 AM	#6
carwash pimpin' IS easy Join Date: Jan 2007 Location: Union, KY Posts: 3,344 Images: 605	same thing happened to ours this past spring to end the season. replaced the whole thing... not sure if the thermocouple is hard or expensive, we just needed a new furnace and didnt want to dump any money into the old one. __________________

10-29-2008, 03:45 PM	#7
fabricator Join Date: Jan 2007 Location: Cincy, Oh Posts: 947	yep, seems to still be still working the way it should __________________ For you guys who can't drive, I have owned a frame rack for several years. Prices are based on your skill and ability to wreck it....

11-09-2008, 12:35 AM	#8
fabricator Join Date: Jan 2007 Location: Cincy, Oh Posts: 947	furnace isn't fixed, it is just messin with my head well at least it's not periodic, doesn't work at all now took what appears to be the flame sensor out sanded, put it back in. has LED's... flashes 4 times then starts what i think is a new cycle doesn't even get to the ignition stage at all pressure switch maybe. looks like the yellow pages on this not sure what else to do here Called the # above but hate 2 keep aggrivating to guy is a far drive for him __________________ For you guys who can't drive, I have owned a frame rack for several years. Prices are based on your skill and ability to wreck it....

11-09-2008, 12:19 PM	#9
itbrokeagain Just Empty Every Pocket - CORE Member - Join Date: Feb 2007 Location: Amelia Posts: 1,435	Hmmmm I thought he lived around here. __________________ 91 fj 80 on 37 Nitto Muds with a 10k winch. Cage and sliders coming soon.

11-09-2008, 05:41 PM	#10
fabricator Join Date: Jan 2007 Location: Cincy, Oh Posts: 947	said he lived in harrison jacked with the pressure switch seems to be working, getting correct volts anyway started jacking with thermostat and it started working again __________________ For you guys who can't drive, I have owned a frame rack for several years. Prices are based on your skill and ability to wreck it....

11-10-2008, 04:46 PM	#11
yellowjacket barely breathing Join Date: Mar 2008 Location: alexandria, ky Posts: 889	hvac dude here. back of your furnace doooor should have a chart what those codes mean. if it is your pressure switch not making, check 2 things. when your furnace is tying to light but failing, take your front combustion air (burner) door off. if it lights now, that means youve got a restiction in the intake pipe. leave, birds nest, ect. dosent light? try to clean your trap. if your furnace is a 90% or more, youll have tubes going down from below the inducer motor to a cannister(trap) before out to the drain. take it off and flush it in the sink. make sure you have it primed with water upon reinstall. hope it helps, rob. ive got to pm you about some other stuff, anyway. rob