lennox furnace not igniting
#1
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lennox furnace not igniting
Its a Lennox m/n 80mgf2-60a-7 s/n 6397d 04704.
draft inducer fan starts but i do not get ignition. actually it lit just once out of dozens of tries but only briefly. now no go.
according to blinking light codes it says:
>watch guard pressure switch>>> pressure switch circuit open or has opened 5 times in single call for heat>broken circuit to pressure switch>pressure switch hose leaks or disconnected>check pressure at induced draft motor>pressure switch closed.
my question now is how to diagnos problem when i can't follow the diagram to these various possible trouble sites.
any suggestions?
thanks!
draft inducer fan starts but i do not get ignition. actually it lit just once out of dozens of tries but only briefly. now no go.
according to blinking light codes it says:
>watch guard pressure switch>>> pressure switch circuit open or has opened 5 times in single call for heat>broken circuit to pressure switch>pressure switch hose leaks or disconnected>check pressure at induced draft motor>pressure switch closed.
my question now is how to diagnos problem when i can't follow the diagram to these various possible trouble sites.
any suggestions?
thanks!
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problem solved
turned out the nipple was packed tight with rust & ash.
had to sacrifice a small drill bit but was able to ream out clog.
started right up! thanks for the direction in which to look.
had to sacrifice a small drill bit but was able to ream out clog.
started right up! thanks for the direction in which to look.