Question about 1990 Chevrolet K2500

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1994 chevy k2500 heater blows cold air

Heater only blows cold air

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: 2004 Chevy Silverado Heater blows cool air

Check blend door actuator for operation

Posted on Feb 15, 2009

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SOURCE: blowing cold air

I had the same problem that I just fix by flushing the heater core out with a hose.   take the two hoses off the fire wall and put the water to it and let flush.  my heater is putting out 150 dg. F  of hot air.   I'm so excited!  i will stay warm now.

Posted on Feb 27, 2009

yotaguy
  • 232 Answers

SOURCE: need Rear Brake Diagram for 1994 Chevy K2500 4x4

Here is the diagram,It is always a good idea to only disaasemble one side so you can use the other side as a reference,I also reccomend using a set od brake pliers,they will the disassembly and reassembly much easier.
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Posted on May 30, 2009

  • 2841 Answers

SOURCE: 1989 chevy silverado heater blowes cold air. both

Feel the hoses going into the heater on the firewall. If one is hot and the other is cool, then the heater control valve is not working for whatever reason. Check the flow valve.

Posted on Nov 07, 2009

Nomodo4u
  • 863 Answers

SOURCE: MY 2003 CHEVY TAHOE'S HEATER IS BLOWING COLD AIR

You need a new thermostat or your thermostat is stuck.  Go to the auto parts store and pick you one up for cheap.  Their fairly easy to install if you got the tools and are somewhat handy.

Posted on Nov 13, 2009

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1 Answer

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Is the fan turning on? I assume so.. when you change the hot/cold selector do you hear the flaps inguage? could be the linkage there. Otherwise, check your coolant level - make sure your heater core isn't plugged (let engine heat up, then see if the heather both heater hoses going into the firewall are warm). If one is colder than the other, flush the heater core.

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Has to be thermostat or plugged hose,,Try new thermostat first.

RB

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