Where can you find a vacuum diagram for a 69 Grand Prix especially for the heater and vent control under the dash?
You can find a 1969 Grand Prix vacuum diagram at most General Motors dealerships. You can also find the diagram in most 1969 Grand Prix service manuals at your local library.
Where can I find a diagram for the vacuum operated heater controls in a 1987 Ford E150 with AC and a 302 engine?
The heater control valve is used to shut off hot coolant from entering the core when the heater is in the off position. A heater control valve can be actuated by either a vacuum line or a cable from the vacuum heater control valve to the heater core. This hose should be warm; if not the heater control valve is stuck and needs to be replaced
There is no heater control valve on this generation of dodges like there used to be... the water flows constantly through the heater valve.. the only control is a trap door that allows cab air to be run through the heater core and is controlled by a vacuum solenoid in the heater box.. the temp control is also vacuum operated but be sure to check the vacuum supply line coming in from the engine.... it…
The airflow direction for my heater on a 1999 Chevy Malibu is not working properly. It doesn't direct where you want it to. Help?
Vacuum hoses are used to operate power brake boosters, E.G.R. valves, P.C.V. valves, and even heater/air conditioning controls just to name a few. It is very important to have these hoses hooked up correctly. There should be a vehicle emission control information sticker under the hood or on the radiator cover with a vacuum hose diagram.
Where can one find a diagram for the heater-air conditioning vacuum harness for a 1988 Chrysler fifth avenue?
everything works fine when its on the floor mode also the cooling fan for the engine does not come on I can't offer specifics, but this thought - relationship came to mind: The air directional controls are vacuum operated - and the engine will run real rough and like to stall when there is a vacuum leak. The heater directional vacuum control is on the firewall - somewhere above the gas pedal. Look in this…
97 gmc Yukon My question is that your heater in the truck does not push out any air from the vents AND if any air does comes out it is warm not really that hot?
Disconnect and isolate the negative battery cable. Remove the center bezel from the instrument panel. Remove the four screws that secure the A/C-heater control to the instrument panel. Pull the A/C-heater control away from the instrument panel far enough to access the connections on the back of the control. Disconnect the vacuum harness from the A/C-heater control. Disconnect the wire harness connectors from the A/C-heater control and remove the blower switch......
On a 98 Mystique the vent airheat will only come out of the defrost ducts- not the center vents or floor vents The Control Heater control switch is OK What should you look for?
somthing is cloged in the vents; or, vacuum line(s), controling door(s) leak, are broken, or disconnected; or, the vacuum source, or servo, used in actuating the heater/AC doors leaks or is inoperative; or, heater/AC control(s) not working properly, or not at all; or, air may be moving out the bottom ducts instead of where you want it to come out (this possibility can be overlooked, especially with fan at low setting).
Answer Because of differences in the vacuum characteristics of a turbo and non-turbo 300ZX the turbo models (Z31 seriers anyway) have a vacuum pump added under the front bumper that comes on when sufficient vacuum is not available from the engine for only the following....water solenoid for heater, ac/heater controls, cruise control.
Antifreeze/Coolant Cooling Fan Pressure Cap Coolant Reservoir Heater Core Heater Control Valve Engine Heater HVAC Hoses & Valves HVAC Thermostat Description: A heater control valve may be located in one of the heater hoses to regulate coolant flow to the heater core. The valve is usually vacuum-controlled, which is operated by controls on the dash. Purpose: The valve is used help control heater output. Maintenance Tips/Suggestions: Insufficient heat, or heat that can�t be turned off…
Heater control does not work on 1991 Plymouth voyger. fan operates normally. control stays on defrost only will not switch to any other function?
can happen when vacuum line is disconnected . look under hood to right of heater hoses. one vacuum line goes to heater valve (gate)on heater hose ,the other should go past this to a small sized metal object the size of a small lemon. if this is disconnected only defrost will work. I HOPE YOUR 91 IS SIMILAR TO MY 93.
A heater control valve is simply a water valve which allows more or less water to circulate through the heater core, depending on how much the valve is opened. When the engine warms up it heats coolant (mostly water) in the water jacket of the engine. To keep the engine from overheating, the water pump circulates water through the radiator once the engine temperature reaches the set-point of the thermostat. When it's cold outside the…