A leaking heater core will leak onto the floorboard and result in a sweet humid smell coolant coming from the vents while in operation.
Vintage air heater control valve not working.
If the heater control valve is stuck closed the valve s inlet and outlet will remain at different temperatures.
This servo is identical to the one that drives the floor vent gate and when swapped it works in all appropriate positions for moving air.
Attaching to the water pump and radiator gives no flow.
Excessive system pressure can also cause vibrations and whistling noises from the expansion valve and refrigerant lines.
It is not defective servo.
Wire between battery and circuit breaker is unprotected and should be carefully routed to avoid a short circuit.
Cobra wiring diagram with servo heater control valve 461171 update 11086 vus 11076 vus trinary switch wiring diagram for ron francis.
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Installing the valve improperly such as having the flow reversed will allow water to flow through thus inhibiting cooling.
Heater control valve installation.
This is not a solenoid valve it s a servo driven valve so there is not a possibility for crossed wiring besides that part is all factory wired.
I had an older va unit in my old 69 that the heat didnt work from day 1.
Always mount circuit breaker as close to the battery as possible.
One needs to be in the intake pressure feed line and the other to the water pump or radiator return points.
Heater control valve connection and chassis ground may be located on either side of the firewall.
The servo can be removed easily from the hot water valve.
Consider heater control valve location and the length of the wiring harness.
Heater control valve warning.
I could never find out why it wasnt getting vacuum from the va.
Some documents contain blank pages.
The heater control valve was not getting vacuum from the unit.
The panel may be mounted under the dash or switch can be removed and installed in dash.
A leaking or faulty valve will have a more pronounced affect on the unit s cooling ability.
Failing to install the heater control valve in the correct hose will allow water to collect in the unit.
One vintage air system i had used two 5 8 dia.
When in heat the valve closes.
Then in summer i would just disconnect the hose plug it.
In winter i would run a vacuum line to the valve from the carb and it worked perfectly.
Servo heater control valve kit electronic servo heater control valve control panel ecu module installation select a suitable location for the control panel.
The heater control valve is a directional valve.
Check for heat transfer by disconnecting hose from the system completely.
