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http://www.icmcontrols.com sc-3801 for your 2 stage best thermostats out there today !!!!!

take a look at http://www.goodmanmfg.com & see what they have in print about warranteeing unit purchased over the internet.

i know a guy that says the dish on top of wally-world is the cause of all the bad in this country. home depot is backing them up too.

gas pressure could be a problem. valves are designed to close with too much pressure. be safe,CALL A MILLER TECH!!!!!

nothing wrong with a beckett nx. very nice burner as a matter of fact. once you get used to them you'll like them.

been selling them 15 yrs & no problems yet. although, i do size & install them properly. does make a difference.

10 gauge heat exchanger on the centennial. 14 gauge radiator. no heat exchanger problems with the cenntenial. you're thinking tempomatic. can't see the big deal over a copper spraypainted radiator....

go with a williamson centennial. 10 gauge heat exchanger,beckett burner. thermopride,13 gauge heat exchanger,italian burner tough to get parts for.

nordyne has a 40,000 90% http://www.nordyne.com

why do you want to lose all those btu's by switching to ng? it gonna cost you almost 30% more on ng. at least you're not on lp.

yellow markers ?

maybe nordyne tech service can help. have model & ser # when you call. 1-800-422-4328 & press 2

i just put in one of those 93% "army furnaces" 2 weeks ago. only thing i wasn't too crazy about was the condensate drain/trap setup. woulda liked a j trap better. runs real nice though. i think i...

where are you? how old is your furnace? your model# is
cmf 80 po serial # ? when was the last time it was OPENED UP & cleaned ?

too bad buford pusser's not around to fix that kimd of stuff.

they run good with a beckett nx too

http://www.icmcontrols.com
good stuff.

is your condensate drain working properly? i had an m2 once that was popping & going off on vent safety & it was because the drain line was kinked & water was boiling in the hx.

there's a kit you can get so you can gut a roof jack & go straight up through the roof. eliminates the bends. may work for you. don't have the part #. call tech service & ask for tom s.,he'll get it...

maybe it's because of turbulence or something. long radius elbows? static pressure test will tell. you don't have insulation or anything in the inducer or heat exchanger do you? i had one where the...

also,your intake is not sucking in exhaust air is it?

i had a vent safety switch tripping on an m3. it was a draft in the wall behind the thermostat.(marriage wall)caused the furnace to short cycle. sounds like you need to do a static pressure test....

maybe you'll get lucky, & some cold dreary night you'll get to work on that cop's furnace & show him what a beating HIS wallet can take.

you could always use an electric furnace with a split system ac. try an e3eb furnace from nordyne. ac ready & all. nice furnace! available in all their brands. http://www.nordyne.com

don't forget george " the animal" steele, or ivan putski