Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater
Lennox G-16 19 years old. Never a problem. Blower works, pilot light works. Will not heat.
Most of the Lennox G-16s that I have repaired were having problems with the gray Penn-Johnson Piggyback igniton control module.
This is best repaired by replacing the spark module. Sometimes it may be neccesary to replace the gas valve also. Lennox updated to a ROBERTSHAW ignition system. Honeywell can also be used.
Also check that there is no water in the pressure switch or tube.
Hope this helps.
Posted on Jan 15, 2009
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Posted on Jan 02, 2017
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