Australian Car Repair Issues? Ask an Auto Mechanic for Answers ASAP
Hello! My name is Gary.Welcome to JustAnswer.I'm reviewing your question now, and will post back with a reply shortly.
What engine in your VS?
If you have bought this car 2nd hand, are the heater hoses connected at the firewall?
If they are connected normally, can you check the heater tap vacuum valve operates in both positions?
The heater tap is in the RH side of the engine bay.
ok, sounds good to start with.
When the engine is at operating temperature, do the heater hoses get hot up to the firewall?
Can you check the heater tap changes direction when you ask for cold or hot?
So the vacuum supply to the heater tap is not working.
Can you also check if you can operate the heater tap manually by pushing on the lever where the vacuum actuator pullrod goes?
Your problem could be a vacuum supply to the cabin, a solenoid pack fault, or some other faults.
So does it feel like the heater tap is jammed?
If this is the case, replace the heater tap assembly.
Note the way all hoses go, most important.
This is the heater valve in the heater hoses in the engine bay .
With the engine off the valve should be easy to move.
Do you need any further help?
I hope my advice has been of assistance to you.
So the old heater tap was not moving, but the new one does move from hot to cold now?
Your installation looks correct for VS.
Are you bleeding the cooling system correctly after changing the heater tap?
Perhaps you have an airmix door problem inside the HVAC case, either actuator or flap.
That's great if have a working spare.
Let's swap it and see what happens.
Looks like you are now looking at why the airmix door actuator is not moving.
Possibly a vacuum solenoid issue, wiring between the climate module and the solenoid pack, a vacuum leak in underdash hose etc.
Start at the vacuum supply hose from the engine with a mityvac vacuum pump tester, to see when the loss of vacuum occurs.
You also need to watch all the actuators function to determine which one is not moving.