Lennox Forced Hot Air Blower Problem

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Old 12-14-08, 07:10 AM
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Question Lennox Forced Hot Air Blower Problem

The blower fan/motor on my Lennox HVAC unit does not automatically go on. When I raise the thermostat, I hear clicking coming from the unit but it will not turn over on its own. I have to physically turn the blower fan by hand in order to get it going.

Any thoughts on what might be causing this?

The Lennox model number is: CB18-26-3P
Blower motor part number is: 42F4901 1/6 HP 208/230 Volt 60HZ 1 HP 1.8 Amps.

Thank you,

Weege
 
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Old 12-14-08, 07:27 AM
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If it starts by hand and continues through the cycle, and then will not start the next time, it's probably the capacitor that is mounted near the blower motor. Normally a round or oval can with wires leading to the motor. Make a diagram or the wiring. Turn the power off to the unit at the breaker box. Wait a few minutes and discharge the cap with an insulated screwdriver across the terminals. Disconnect the wires and take the cap to an HVAC or electrical supply store for an exact replacement.

Not an HVAC Pro here, but thats a pretty common problem.
 
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Old 12-14-08, 10:27 AM
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Thanks Gunguy45. I had a feeling it may have been the capacitor so I purchased a replacement yesterday. I have not installed it yet waiting to hear responses from this thread. I hope the solution is that simple and that inexpensive. I'll write back with my outcome.
 
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Old 12-16-08, 10:14 PM
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Just want to let you know that your advice paid off. I replaced the capacitor and the blower works again...thank you!
 
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Old 12-17-08, 08:19 AM
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Yer very Welcome...I try to help where I can.
 
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