lennox pulse problem - http://www.hvacmechanic.com/ Forums
Original message
| android
|  "lennox pulse problem"
, posted Sun 10 Feb 13:31  
is there a qualified lennox service tech logged on?
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Replies:
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| northernfitter
| "Re(1):lennox pulse problem" , posted Mon 11 Feb 05:54
There are a number of things to check before you go and change the module. Check that the air flapper is clean first and foremost. 90% of the time when you hit a pulse its going to be maintenance issues like the air flapper. I have never heard of that module deenergizing the ventor mid cycle. More likely its not igniting properly and runs rough for a little while then quits which would be a dirty flapper most times. It's a unique furnace to service to say the least but in my humble opinion it's still one of the best built furnaces out there.
14years as a service tech in Ottawa and the valley. www.reliableheating.ca. For furnace manufacturer ratings go to
http://www.consumerreports.org/cro/appliances/heating-cooling-and-air/gas-furnaces/furnaces-repair-history-205/overview/index.htm?resultPageIndex=1&resultIndex=1&searchTerm=furnace
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| marchvac
| "Re(1):lennox pulse problem" , posted Sun 10 Feb 17:01:
What is the problem
What is model and serial#s
Be careful sometimes you don't get a second chance
[this message was edited by marchvac on Sun 10 Feb 18:50] |
| | android
| "Re(2):lennox pulse problem" , posted Sun 10 Feb 18:35
my friend has a g21q3-60-1, it locks itself out and im not there to catch the problem. It has the white johnson control mod. Gas pressure, pressure switch, trap, flapper, flamesensor tested at 1.9 micro amp, i want to say its the module, i think it is deenergizing the purge motor. do you have the charts on the blinking codes?
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| | marchvac
| "Re(3):lennox pulse problem" , posted Sun 10 Feb 19:22
Sorry about the upside down chart. 
Be careful sometimes you don't get a second chance
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| justsomeguy
| "Re(1):lennox pulse problem" , posted Sun 10 Feb 13:43
No
BillyBob
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