Lennox G2303/4-100-6 LIMIT SWITCH - HVAC - DIY Chatroom Home Improvement Forum


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Old 01-13-2011, 08:33 PM   #1
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lennox G2303/4-100-6 LIMIT SWITCH


My heater codes say that the primary/secondary limit switch is open. Can anyone tell me what that looks like an how to replace it. Also, what would cause this. If i turn the system off and then turn it back on the heater will work. The heater is maintaining my house at 65 degrees so, i know it still works but, it will not keep it at the setting of the thermostat. My technician is on vacation and i don't want anyone else working on it so, i am turning to the web for your help. Thanks

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Old 01-13-2011, 08:54 PM   #2
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lennox G2303/4-100-6 LIMIT SWITCH


Chanber getting too hot. Lack of air flow. Not a good idea to run it if it's cycling on limit

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Old 01-13-2011, 09:00 PM   #3
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lennox G2303/4-100-6 LIMIT SWITCH


Do i need to open more vents or what? My buddy thought that i just needed to change the filter but, it happened again after replacing.
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Old 01-13-2011, 09:04 PM   #4
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lennox G2303/4-100-6 LIMIT SWITCH


Yes, If you have any supply vents closed . Open them. Never close off vents unless your unit was designed to do so. It resricts air flow
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Old 01-13-2011, 09:15 PM   #5
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lennox G2303/4-100-6 LIMIT SWITCH


it has been on for about 40 min without shutting off so, i will see how it goes. any more suggestions?
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