|
Hello,
If correctly connected:
The far left lever is labeled "AIR" opens the large rectanglar door that faces th firewall. If you want maximum defroster, you should have this door closed and the lever in the fully up position to close this door.
The center lever is labeled "DEFR" and opens the smaller oval door behind the metal or plastic manifold that is screwed to the heater box and that the defroster ducts are connected.
The far right lever labeled "TEMP" opens and closes the heater valve.
To check the condition of the air door and defroster door seals, run the fan motor on high with the both doors closed. Check that the levers are in their fully closed position and if necessary, remove the cable from the lever. Feel for air flow at the defroster ducts at the windshield and at the area in front of the air door. If either leak significantly you should consider rebuilding your heater box.
All the seals, gaskets and hose are available new.
If you decide to rebuild, take the opportunity to have the heater core checked at a radiator shop. Make sure they check the rubber deflector inside the tank with the hose barbs.
I am about to reassemble a customer's heater box in a 1963 122 that is getting a brand new custom made heater core.
--
Eric
Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
Torrance, CA 90501
|
