Question about 2006 Chevrolet Silverado 1500 2WD

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My a/c will blow cold, than it will blow hot while going down the road?

Also while a/c fan is off it will blow hot air. It cycles back and forth and if I turn it off and then back on it usually blows cold air. I've checked compressor and large line, they have always been working each time I've had this issue.

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  • chris mac donald Sep 04, 2012

    Hey everyone, more diagnostics on this problem. Riding with my dad the other day the problem with the a/c blowing hot air while going down the road happened again. I told him that it was blwoing hot air again and he said it wasn't. Long story short. It seems that with the seperate temperature controls that the hot air is only coming out the driver side vents and not the passenger side vents. I have only noticed this with the middle level vents. I will check to see if it happpens on the floor vents next time it comes about?

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Could be low on coolant..in AC system..

Posted on Aug 22, 2012

  • chris mac donald Sep 04, 2012

    Will have it checked. thx

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  • Contributor
  • 21 Answers

The low pressure cycling switch on the drier can cause this sometimes cool or not condition. When not cooling, tap with a pencil or something similar and see if compressor kicks in. Also, you can jump the connector and see if that works.

Posted on Aug 26, 2012

  • chris mac donald Sep 04, 2012

    Not sure what the drier is?

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Posted on Jan 02, 2017

ndguy2481
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SOURCE: 2006 chvy impala when idling dont blow hot air

1 Inspect Cooling System Mix Coolant level low or flow is restricted. grey_line.gif 2 Inspect Thermostat Thermostat stuck closed grey_line.gif 3 Inspect Heater Control Valve Leaking or defective heater control valve. here something to help u

Here to help Shaun

Posted on Nov 23, 2008

  • 217 Answers

SOURCE: '98 S-10 heater blowing cold air - not hot air

will the air flow switch from floor to the mid to defrost? if so then we have a problem with the tempature door actuator. easy to replace just in tight place. Keep me posted for more help or if this was any help thanks

Posted on Jan 31, 2009

  • 713 Answers

SOURCE: Drivers side AC will blow hot air.

the blend motor on the vehicle is probably bad

Posted on Aug 20, 2009

dvs9mm1971
  • 114 Answers

SOURCE: Temperature gauge fluctuates and the heater blows cold air

Sounds like the thermostat needs to be replaced. If you do the work yourself be sure the temp threshold is correct and the flow direction is correct when installed. Good luck to you

Posted on Oct 16, 2009

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