whirlpool air handler


Old 07-20-14, 09:50 AM
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Question whirlpool air handler

i have a whirlpool air handler model # WAHMS3642P4A and the serial numb is 1001706709.
what would cause the fan to slow down and then pick speed back up again? this is happening every 5 mins.
any help greatly appreciated.
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Old 07-20-14, 10:08 AM
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Welcome to the forums.

You have an electronically preprogrammed and controlled fan. The following is some info on it.
Whirlpool comfort Air Handler 2001.pdf

I'll let the forum pro, Houston, handle the servicing part on this one.
Old 07-20-14, 10:57 AM
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It looks like that model number ships with a PSC motor.

Standard Features - WAHMS
Direct-drive, PSC multi-speed motor
What thermostat is connected to this air handler?
Old 07-23-14, 02:37 PM
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rest of message

It's a 2 zone system ewc control panel ncm300L with 2 Honeywell iaq thermostats which has a true steam humidifier and a renueaire heat exchanger tied into a modular control board

Last edited by Groverdog; 07-23-14 at 02:40 PM. Reason: entered wrong

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