Excuse me if this is sidetracking the topic, but why not get rid of the heater all together? My Pantera is an ex-California car without heater. When I bought it I had on my to do list to reinstall heater, living in Denmark. But when I had to drive it to the authorities for an approval process on a day with 0 degrees celsius, I discovered that I wasn't cold, the engine in the back and the coolant pipes in the bottom quickly heated up the cabin. The reduced complexity and risk of scalding from not having a heater outweighs the disadvantages IMO
I have A/C though, wouldn't be without it...
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.