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On the newer models... The heater core always has maximum water flow going through it. There is a door in the HVAC system that either entirely isolates the core from the air flow or diverts varying amounts of the air through the heat exchanger. The door is operated by an electric stepper motor; the knob is technically a position sensor.
What else can I help you with?
How do you replace heater core in a 91 Chevy truck?
replace heater core in a 1991 Chevy work truck 1500
How does the Chevy Volt heater work?
nuke power
Why doesn't the heater work on a Chevy Equinox?
If you cannot change the temperature from cold to hot on an Equinox or Pontiac Torrent, a common cause is a broken temperature door. This is a very difficult repair.------------------------
Acuator valve replacement for heater 2005 Chevy venture?
my heater fan in front of my 2004 chevy venture van wont work
Why don't the heater or defroster don't work in a 1993 chevy caprice classic?
Why the heater or defroster may not work in a 1993 Chevy Caprice Classic because of the heating core is going out.
Have a 1981 ford futura and the heater core is new but the heat does not work in the car the blower just blows cold outside air the hoses going to the heater core get hotWhy no heat inside?
Defective heater temperature control valve.
Why would your ac work but not your heater in your 95 intrepid?
They are entirely different systems. One does not control the other. You have a problem in your heater core, heater control, water circulation or hoses.
Why The heater control on 1992 Chevy truck k1500 does not work?
My heater and ac controls went black yesterday. I found some online advice. One guy said to disconnect the battery. I thought that worth a try. Walla it fixed my problem.
What is work temperature Chevy 305?
195 F
Heater wont work on 98 Chevy Silverado?
Check your coolant. Is it thick and gunky?
What causes the heater blower to work sometimes then to not work other times in a 2002 Chevy s10?
The heater blower switch and the electrical plug attached to it may be at fault. Remove the heater control unit from the dash and inspect the plastic electrical plug attached to the blower switch, you may see it has melted. The switch and plug is available from your local auto parts store.
What causes the heater blower motor in an 2002 Chevy silverado not to work in 1-2-3 speed but 4-5 speeds work fine?
the heater fan resister,it is or should be on inside or on outside heater box.
