Reply With QuoteWhat is the issue with your switch? If it's only working on one setting and not on others then its likely not the switch, but rather the "sword".
Rod
Originally Posted by Anton CH.
Major Contributor
Is there any way to check if the heater control pot. works without removing
Distribution control panel. I would like to hook it up to a ohm-meter and check if the resistance changes as I turn it. Removing the distribution control panel seems like a lot of work.
Big Time Poster
What is the issue with your switch? If it's only working on one setting and not on others then its likely not the switch, but rather the "sword".
Rod
Major Contributor
Rod,
My passenger heat is not working. I don't think my car has a "sword". My guess is that the pot not working. I would really like to hook an ohm-meter up to it and see if it changes the resistance as I rotate the heat switch. I was hoping there was another way to check this as I really don't feel like removing the control panel.
Isn't this more likely to be a sticky heater solenoid under the bonnet?
Major Contributor
Pretty sure its not the valve, I have a new one installed.
Big, Big Time Poster
What happens if you electrically disconnect the heater valve? Do you get full heat on both sides?
Paul Shovestul
.....Got to keep the loonies on the paath.
Major Contributor
Is it supposed to blow warm on both when you disconect it? Doesn't the dial only allow you about 5 degrees of seperation so both would be warm anyway?
Big, Big Time Poster
On E28's when you disconnect, heater valve goes wide open. E34's may do the same....if so I'd expect both sides to go full hot, regardless of dial setting. I understood your symptoms are no passenger heat but air flow is fine...is this correct?
Paul Shovestul
.....Got to keep the loonies on the paath.
Major Contributor
Airflow seems fine. I think my aux. water pump might be faulty but that still shouldn't cause it. I'll try it out tonight.
Big, Big Time Poster
My understanding is that the aux water pump is needed for low speed driving when engine speeds don't get high enough to ensure water circulation through heater core. If you suspect a faulty aux water pump, then be sure to do your testing at highway speeds or in lower gears to keep engine speed up.
Paul Shovestul
.....Got to keep the loonies on the paath.
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