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[alanfp]

Hi All

I've had no heat in my casr since I got it.  I suspected the HBV and got my VX dealer to change it, but things are no better .  They did warn me that it might not be that, but offered to diagnosis / testing at their usual rates - I declined and got them to do the HBV - maybe they do know better than me after all!

Anyway, any other ideas?  They say it MIGHT be a lack of vacuum (so the valve isn't operating).  Is there just the one narrow vac pipe attached to the HBV, and is there any easy way of checking the vacuum on it?  

Any help would be appreciated, as the heated seats don't warm my hands and it's now sub-zero.

PS the aircon has never blown cold - I tried to top it up with refrigerant.  Could this be related to the HBV as well?

Alan

[hotel21]

HBV only has one vacuum connection.  Check back through entire system to ensure its vac tight.....  Rear multi rams, front multirams etc etc....  Guide here

[alanfp]

Many thanks.

Is there an easy way to check for leaks. I'm thinking that listening wouldn't be any good, fairy liquid around joints won't show a leak IN to the vacuum, hopefully I don't have to replace all the lines with new ones???

[hotel21]

usual prob is lines popped from rubber connectors....

[Entwood]

Many thanks.

Is there an easy way to check for leaks. I'm thinking that listening wouldn't be any good, fairy liquid around joints won't show a leak IN to the vacuum, hopefully I don't have to replace all the lines with new ones???

Sometimes a quick spray of a fine aerosol mist of carb cleaner can help find a vac leak, as you spray near the inwards leak the aerosol mist can be seen to move towards the leak, and often the engine note changes as the highly combustible cleaner is drawn into the engine. I use carb cleaner as once the leak is found a wipe down with a bit of rag over the sprayed areas tends to leave the engine nice and clean as well  !  

[duggs]

I had the same problem up until last weekend....Shes blowing really warm/hot now though.
MIGHT not be the same solution for you though.

I drained the system down completely, then blasted water through the system using a hose, blasting directly the wrong way up into the matrix with the heater set to full on of course. Did that for a min or so THEN blasted water through the correct way..although I have the advantage of an "in line" auxillery water pump, stuck under the water bottle, you can equally blast water directly into the matrix where the pipes enter the bulk head.

Well...don't know exactly what it did but its great now. There are a lot of posts on here regarding heating problems....process of ilimination really....but they do reckon that several flushes are required to properly clean out the system...This was my 5th flush over these pass 6 months BUT I'd never used the water hose directly "up the pipes" before...assume I had a blockage of some sort, could have even been an air lock but a water blast sure as hell sorted it. For the first time ever, I need to turn the heating down now....tis been a pain though.

Good luck.

[alanfp]

Thanks for your replies.

i WOULD NEVER HAVE THOUGHT OF .....dAMN cAPS lOCK........That's better...... the aerosol idea.
And maybe I should have thought of flushing the heater matrix out first - I have in fact done that on a car years ago with the same success.  Thinking about it now, it's probably full of radweld that the previous owner used, in a futile attempt to stop the coolant leak.

I love this forum.

I'll post with any successful results (but I'll probably just sulk if it doesn't work)

[ians]

don't worry about the HBV - it would have gone at some point anyway..