Look near or behind the alternator. The valve that controls flow of coolant to the heater core on my 1987 Aerostar is located on the left wall of the engine compartment. I imagine the 1991 is similar. Trace the heater hoses from the engine/water pump and you will find it.
There isn't a water control valve. The airflow is directed around the heater core by a door to control temp.
may be your heater control valve
The heater controlvalve is located on the firewall just to left of your powerbrake booster.It will have two hoses going to it,one goes directly into firewall and the othoier hose will be attached to your heater control valve,then spliced to your firewall! Hope this helps.
Heater Control Valve IF there is Vaccume going 2 it.Butt feel both heater hoses & if the Valve is bad - only one hose will b HOT.
either your heater control valve is bad or you heater control switch on your dash is broken pull the knob of and see if it is cracked.
as far as i know it on the vac by the firewall left side
This is an indication that your heater core is leaking. To stop the leaking you will have to replace the heater core or stop using your heater.
The 1991 Acura Integra idle air control valve can be found on the firewall. The valve will be on the drivers side of the firewall.
remove the bench seat behind the drivers seat. remove the service panel from the interior panel on the drivers side.
1991 PA ???? Low coolant in the system,...... faulty vacuum door between the heater core and evaporator (A/C) core,..... bad heater control valve,.....
The idle air control valve is located on the throttle body, and the EGR valve is located on the intake manifold.
The air control valve on a 1991 4.3 S10 is on the engine. Kindly refer to your usual manual to see the exact point, where it is located. The Idle Air Control is attached to the base of the throttle body.