auto mechanic help

[Gindog]

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

[Cmj]

Heater core

[JJohnson]

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

[supergooser]

Core

[Turtlebait]

I think its your switch that controls hot and cold...

[Lundfisher]

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.

[RLS]

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

[Scrapper]

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.

[Gindog]

thanks Guys it hot on both sides. where do I fine that HVAC fuse?

[Turtlebait]

Look on the internet for you make and model,should find a picture showing you where and how to rrmove