On 2008 Avalanche LTX 4x4, the air/heater fan moter will cut off and sometimes will hot come on either high or low; when it is running the air puts out fine. I have replace the Relay Fan con and it did not solve the problem.

SOURCE: Engine running hot

Sounds like your antifreeze level is low. When it flows you get hot air and when there's an air bubble due to lack of antifreeze all you'll get is air.

SOURCE: 2003 Silverado 2500HD airbag light on

HI Had same Problem. Found the door sensors had droped and not in correct possiation. the differance light stays out and functions properly. if the door sensors not on check degree the light stays on.

mike loshbough

• 1011 Answers
• Posted on Feb 01, 2009

SOURCE: 2000 Impala heater/air fan switch

the problem is the blower resister located under passenger side dash in back .take cover off bottom look toward back fire wall there should be about 4 wires unplug wires 2 7mm. bolts hold the switch in .please rate this answer thanks.

SOURCE: air condition fan only works on high speed, no low speed

You have a bad blower motor resistor. This is located under the dash close to the blower motor itself

SOURCE: heater fan relay

inside firewall under glove box