Question about Cars & Trucks
Heater coil replaced still blows cold
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Posted on Jan 02, 2017
Check coolant level and then check to see if both heater hoses are hot. If on is hot and the other luke warm or cold, you might have a plugged heater core. If both are hot then you might have a problem will the what they call a "blend door actuator". Both need to be diagnosed be a mechanic because they will required the dash to be removed to be repaired. $$!!!
Posted on Nov 19, 2008
SOURCE: heater blowing cold air
squeeze the hoses to get any air bubbles out and refill coolant as necesary. are you sure you put thermostat in the right way? may be backwards. also may be your sensor.
Posted on Jan 04, 2009
Have you checked the coolant level? What you describe is exactly what happens if the coolant level is low. When stopped at idle, hot coolant is not circulating through the heater core, so no heat. As the engine increases in rpm's when you pull away from the light, the water pump is spinning quicker, and some coolant is making it to the heater core. So check the level, and if it is low, keep an eye on it to see if it drops again. That of course indicates a leak somewhere. Get it fixed, as overheating the engine leads to costly repairs and worse case a new engine. Let me know how you make out with this.
Posted on Dec 05, 2009
Testimonial: "Thanks Curt! You were right ON!"
my 2000 saturn sl blows cold air with the heater on. I changed the thermostat,and checked out my heater core.Still blows cold air.
Posted on Oct 10, 2010
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