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that blue smoke only comes if furnace is turned down over night and you turn it up in morning.i watched it today when she turned it up first thing inmorning.blue smoke came out for 5 seconds ,then...

i thought that too but i talked too many repairman ans some said they removed furnaces 50 yrs old and still good.they could have sold me a furnace and said,oh its 30 yrs old.many said thats a lot of...

-it is hot air oil furnace 30 yrs old.i opened the door on front to watch flame and there is smoke going up,white looking.when i go outside to look at chimney ,SOMETIMES at start up blue smoke like...

the repairman thought the igniter might be getting bad.some said it could be a after drip?what is after drip and how is it corrected??when i looked in the firebox are running about 3 minutes, i could...

hello, i have a 30 year old furnace ,oil hot air.i had repairman out, he changed the filter, nozzle, cleaned it,and checked it for smoke and burn eff.he said it was 80 % and ok to keep.it blows blue...