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1 Answer

Ac/heater onlu works on low


you either have a bad switch or bad fan motor. I would start by replacing the switch

Apr 09, 2014 | 1990 Toyota Corolla

1 Answer

1998 buick century my heater and ac fan only work on high i'm told it's the blower relays where are they located


they are not relays its a blower motor resistor a one piece unit usually held in by two bolts and an electrical connector either under the passenger side dash or behind glove box

Aug 03, 2012 | 1990 Buick Century

1 Answer

1997 Nissan 4 cylinder truck AC works excellent throwing snowballs cold air, then it will blow hot air. Relay switch and clutch has been replaced....Did not fix problem!


sounds like compressor isn't working properly or heater vacuum is opening vent to heater core.try turning on ac and if it cuts on and off repeatedly every few seconds the freon level is not correct or high pressure switch may not be working make sure radiator fan comes on when ac is on.if all this is working properly check vacuum hoses to heater may be opening vent doors to heater.hope this helps

Aug 11, 2010 | 2005 Nissan Altima

1 Answer

AIRFLOW KNOB FOR HEATER AC ONLY WORKS ON HIGH


you need a blower resistor. The motor may be bad, pulling high amps.

Jul 23, 2010 | 2004 Jeep Liberty

1 Answer

Heat only works on high


HEATER BLOWER WORKS ONLY ON HIGH SPEED.PROBLEM COULD BE FAULTY BLOWER RESISTOR OR BAD AC AND HEATER CONTROL SWITCH.

Jun 16, 2010 | 2002 Chrysler Town & Country

1 Answer

AC/Heater only works on high


the motor may have too much resistance to work on any other speed.

May 12, 2010 | 2006 Chevrolet Trailblazer Ext

1 Answer

Heater/AC blower works on high only


Blower housing resistor fried up.You will have to replace whole blower assembly.

Jan 04, 2010 | 2002 Chevrolet Impala

3 Answers

Blower speeds on ac/heater for 2003 chevy pickup(v6)


Hi, sounds like your blower motor resistor needs to be replaced. If not the resistor, check the blower motor.

Jul 27, 2009 | 2008 Dodge Ram Pickup 1500

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