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I have a 2001 Chev.s10 heater has stop blowing hot. I flush out system and flush out heater lines (water running out both side heater line). Put in new thermostat also. Truck will run at 200 temp and heater still blows cold. I not sure where to look from here. thanks
Heater core
Check hoses if one hot and one cold
flush it out. if it has been low on coolant
in the past remove coolant cap with eng
cold start eng and keep coolant topped
off while it is running
Core
I think its your switch that controls hot and cold...
Your truck has an actuator motor that controls the blend door sometimes if you unplug the controller for a few mins it will reboot and fix it.
I had a 98 that had a sticky blend door. I had to take the thermostat resistor assembly out and use a long screw driver to open or shut the blend door all the way
They are right about the blend door...although they normally default to hot. If you'll find your HVAC fuse and take it out for a minute or so then replace it, it will also reset. If you are 200 degrees with water in and out of core its not the core.
thanks Guys it hot on both sides. where do I fine that HVAC fuse?
Look on the internet for you make and model,should find a picture showing you where and how to rrmove
Should be in your fuse block...normally under the driverside dash somewhere or on a fenderwell under the hood. Will be labeled hvac or ac or a/c or heater...something similar. Anything that has to do with the a/c or heat take it out. An easier way if you don't mind redoing your stations is just unplug battery...both sides and then while unplugged either touch the cables together or turn your on headlight switch. This will drain all remaining juice from system and normally full reset upon hooking battery back up.
Thanks Cat I will see what the outcome is. I going to have start using it soon it out temp keep falling