Hi all, I topped up my AC a couple of weeks ago and of course had it running constantly since.
Tonight it got a bit chilly so I turned up the heat to about 25 degrees. The centre vent closed but the heat wasn’t forthcoming, still bloody cold air at the other vents.
Is this a blend door sticking issue?
Larry,
Almost certainly - unless the coolant shut-off valve on your car is stuck closed preventing hot coolant from entering the CCU - hence no heat out.
Check your blend flap operation this way and report :-
After determining that BOTH blower fans are operating
(by pulling the individual L & R B4 fuses one at a time) and
with the engine up to normal operating temperature, set the
temperature control knob on the panel to ‘Full Cool’, the slider
control to ‘cold’ and select the ‘Manual’ button. Then set the
fan speed on ‘Defrost’ (nothing else selected)
You should get:-
Turn the fan speed control to ‘High’ and select the ‘On’ A/C button.
After a delay of, perhaps, 45 seconds, you should get:-
5) NO air out of the demist vents
6) Cold air out of the side face vents
7) Cold air out of the centre face vents
8) Cold air out of the footwell vents
[You can increase the effect of the air conditioning by using
the ‘Max’ button which will override all other functions except
‘Defrost’ and ‘Off’ and put the fan speed to ‘High’ if not already there]
Press the ‘On’ button, turn the temperature control knob to ‘Full Heat’
and the slider control to ‘hot’.
After a delay of, perhaps, 45 seconds, you should get:-
9) NO air out of the demist vents
10) Hot air out of the side face vents
11) NO air out of the centre face vents
12) Hot air out of the footwell vents.
NOTE:
Thanks Bryan, I’ll get down there in the footwell and start whacking away I guess 