The water temperature gets high when the vehicle is in Idle. The heater takes an excessive amount of time to warm up. The thermostat has been replaced and the problem persists. Could the issue be the water pump?
Could be because the water doesnt seem to be circulating .... remove the pump next and check the impellar ,,,, after that if its ok i would flush out both heater rad and engine rad to clear any blockages
SOURCE: 2004 Impala heater stopped working
sounds like ur thermostat is sticking open its an easy repair if u wanna get an ideal how to do it u can get a service manual from the libruary
SOURCE: Problem with No Heat on 2005 Chevy Avalanche - Cooling System?
it is most likey a sticking thermostat it either gets stuck closed or open in your case closed so collant isnt getting to the heater core and all you get is cold air blowing into the truck.
its a simple fix you can either do it your self or take it to a mechanic. now remember there are differnt thermostes so think about the climat you live in and get one according to that
SOURCE: Water pump on 2005 Chevy Equinox
Water pump is locate on the front center of the engine.
I will rate water pump change as a 7/10 in difficulty scale.
You should check for special tool(s) requirement from the library before you start.
It's a good time to change the drive belt at the same time.
50/50 coolant mix is fine.
If you haul heavy load or in cold climate then bump it up to 60/40 mix
DO NOT FORGET to find or draw the belt routing diagram before you undo the tension.
A 30 second sketch will save you a lot of time.
SOURCE: my heater takes a long time to warm up
You may need a new thermostat. They are cheap and easy to install on a blazer. They sell different temp ones. ask for a higher temp thermostat if you want warmer heat. Also it would be a good idea to get the cooling system flushed. That helps a lot.
Testimonial: "Thanks for the answer. A new water pump and radiator was installed."
SOURCE: I have a 2005 Chevy Equinox and my AC only blows
I believe this will fix your problem. Read the reviews at the bottom of the page. The same compressor is on some Fords.http://www.acpartshouse.com/showitem.aspx?&id=116597&name=New%20A%2FC%20Compressor%20Control%20Valve
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