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chengny · 12-03-2014, 12:02 PM

If the truck is AC equipped, make sure the compressor is not kicking in. Just pull the connector off the low side control switch (on the filter drier shell) - the compressor clutch is fed through that switch.

12-03-2014, 12:02 PM	#7
chengny Registered User Join Date: May 2007 Location: New Hampshire Posts: 349	Re: Heater Help If the truck is AC equipped, make sure the compressor is not kicking in. Just pull the connector off the low side control switch (on the filter drier shell) - the compressor clutch is fed through that switch.