Question about 2001 Chevrolet Silverado 1500
Other than the thermostat, what could be wrong with my truck that would cause no heat to come out of the air vents? Temperature knob has been set at varying settings from medium to high, but no heat ever comes out. It blows cold air only. Engine temperature gauge stays consistently under 210.
The heater radiator could be blocked or the valve controlling the heater could be faulty ,,,, carefully check the heater hoses ,, they are the small ones running from the engine bay through the bulkhead into the car,,,they both should be hot ,,, if one is cold the water is not circulating either due to a blockage or the heater valve not working ,,, if the car has climate control you need to be sure that it is serviced properly as this system mixes the hot and cold air,, also at 210 you should have some heat , the best way to check if its the thermostat is to run the carstationary until it gets hot even if the thermostat is faulty the system will build up heat due to no cold air passing through the grill and coolng the engine radiator
Posted on Feb 11, 2012
Testimonial: "Ok, so we replaced the thermostat (even though it looked completely functional when we got down to It) since it was only $7. That didn't fix the problem (not a big surprise). So, we then followed your suggestion of checking the temperature of both hoses going to/from the heater core and only the hose carrying water into the heater core is hot, the other remains cold even after running the truck for 10-15 minutes. Temperature gauge appears to be working correctly, with it slowly climbing to right under 210 and then falling/rising consistently between 195-210. All of this leads me to believe that the heater core is blocked or otherwise broken. I do not believe there is anything like a "heater valve" on my truck. Any thoughts aside from replacing the heater core (or does that even sound feasible to you)? Thanks!"
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Posted on Jan 02, 2017
Depends on what thermostat you put in. Stock is a 190*. Which will usally run about 200-210. That's where most all small blocks are happy.
Posted on Nov 09, 2009
There is a temperature sensor likely to be on your radiator. Make sure the connection is plugged in. Sometimes un-plugging and plugging it back will correct the issue. If not, you'll have to have some check if the sensor is faultly or if the electric wire is fault. You can check your fuse box. I don't think it's a fuse because other things on your instrument cluster would also not work.
Posted on Dec 26, 2008
It sounds like a water pump to me. Check the pump for leaks. then tak off the radiator cap. Start it up and watch, to see if the water circulates. (ONLY TAKE THE CAP OFF WHEN ENGINE IS COOL)
Posted on Jan 07, 2009
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