My old 1978 g12d55 Lennox furnace isn't cycling correctly

coldon1 Posts: 1, Reputation: 1

New Member

Dec 17, 2012, 01:54 PM

My old 1978 g12d55 Lennox furnace isn't cycling correctly

Hi I have an old g12 its always worked well but recently it has had trouble (intermittent) firing up. Seems like most of the time It will flame up but it sounds like the fan is trying to come on but it can't quite make it. If I tap the anticipater(?) with a screwdriver a few times it will come on but after a couple of cycles it does it again. I Believe I replaced that part once already... maybe 5 years ago. Any Ideas? Thanks, Greg

Check out some similar questions!

Lennox 10acb30-11p air conditioner is not working correctly [ 1 Answers ]

The thermostat is set at 72 degrees. The unit's fan begins turning within a few seconds there is a buzz then a click. The fan continues to turn properly but every few seconds there is a buzz. The unit is not cooling the house properly. What could be the problem?

Lennox furnace shuts off before reaching temp? Model lennox c33-44c-2f [ 0 Answers ]

Had cold snowy days and furnace will shut off before reaching set temp. The exhaust pipes were in the direct path of the blizzard. I can't see any ice blocking but there is a large chunk that appears to be from one of the pipe.

I have a lennox outside a/c unit and a lennox g26 series furnace.Low hum no air/ht [ 4 Answers ]

Lennox Value Series... serial 5896G56798 M/N 10ACB365-5 P Central a/c unit and a Lennox G26 Series gas furnace both about 13 or 14 yrs old. Came home from vacation and turned A/C on (son tried earlier in the week) only a low hum whether on auto or fan or if we try heat(same thing, low hum)......

Old lennox with standing pilot and cam stat cycling [ 8 Answers ]

Hi gents Old lennox model 9803-980-2 H.boy 68000 BTU with a honeywell fan limit cycling every 5minutes . The wires disconnected at the Stat and jumpered . Still the furnace acting same problem . The motor and blower wheel and pilot acting quite normal . Do you think the fan limit is faulty...

Older Day & Night Furnace NOT Cycling Correctly? [ 20 Answers ]

:( I have a Day & Night Furnace MODEL # 397HAW036060 (1982), the Problem(s) are as Follows: 1) The Blower is coming on BEFORE the Burner starts to Cycle, and runs for about 10-12 minutes on Hi-Speed, blows a lot of cold air into the House...Isn't the Burner supposed to Start 1st?? How to Correct??...

View more questions Search

Check out some similar questions!

Add your answer here.