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[MV6Man]

Iīll describe my problem first.

I took my car to local aircon specialist, filled it up and added some lubricant to it. After that it just wasnīt cold enough, it freezed air to about 12C.
Then i checked my vacuumpipes, IMO they were routed correct.
Then i pulled those pipes loose from vacuumtank what sits under scuttle, i just connected those pipes together and voila! it blows about 3C air, and that is enough cold to me. Climate control does itīs job much better now, because it has cold air now and it doesnīt use those 6-9 fan speeds so much.

So there werenīt enough vacuum on HBV, so it was not fully closed??

What are your opinions, is there:
1  a small leak somewhere in that vacuum pipe
2  a broken (glogged) vacuum tank
3  jammed HBV
4  faulty vacuum piping somewhere
5 or something thatīs not in this list?

If iīve figured that tank operation correct, it allows driver to use those A/C controls, when engine is not running.

When throttle is fully opened, is there enough vacuum for HBV and A/C to be fully controlled?

[Marks DTM Calib]

It sounds like you either have a faulty vac tank or the pipes were connected the wrong way round to it.

The vac tank has a non-return valve in it so vac can be stored.

You do need the vac tank to get good operation though otherwise on wider throttle openings the flaps and HBV will do strange things as the vac drops off!