Kevin Mulholland
New Member
Members, I'm working on the HVAC system and have run into some puzzlers? When I bought the car (300 L)the heat/ac was dead in the water, not even defrost/fogger. As I've gone through it, the vacuum system is working properly, the resistor is in good shape and I have current to the blower motor but it was still a no go. I pulled the old blower motor(frozen solid) by taking out three 1/4 screws around the collar on the engine bay side. Everything came out at once-squirrel cage and all-which seems weird. At the bottom of the opening in the firewall is a copper tube that is a pass through from the engine bay to the behind the blower wheel (pics included). Anybody know it's purpose? Also, the interior side of the blower wheel is visible behind a cage unless I close one of the vacuum doors (don't remember which one at the moment) and I've included a pic of the copper tubing coming in under the dash-should it be insulated to cut down on condensation (pics included). Previous mopars I've worked on didn't have A/C so this is a little strange to me . Any help is appreciated.
Pics got out of order: Pic 139 and 142 (1st and 3rd)show the tube/pass through from engine to behind the squirrel cage-put a ratchet extended in the tube on the second one to make it easier to see)
Pic 144 (4th pic) shows the cage/box that fits infront of the blower wheel. I can look at the blower wheel from inside the car, unless blocked by a vacuum door-it's currently unattached_I removed it for cleaning you can see the actuator.
Pic 145 (5th pic) shows the opening where the blower motor and wheel go-if you look around the collar you can see the 4 holes where the cage/box mounts with 1/4 sheet metal screws.
Pic 146 (2nd pic) show the copper tubing connecting to the underdash a/c box.
Pics got out of order: Pic 139 and 142 (1st and 3rd)show the tube/pass through from engine to behind the squirrel cage-put a ratchet extended in the tube on the second one to make it easier to see)
Pic 144 (4th pic) shows the cage/box that fits infront of the blower wheel. I can look at the blower wheel from inside the car, unless blocked by a vacuum door-it's currently unattached_I removed it for cleaning you can see the actuator.
Pic 145 (5th pic) shows the opening where the blower motor and wheel go-if you look around the collar you can see the 4 holes where the cage/box mounts with 1/4 sheet metal screws.
Pic 146 (2nd pic) show the copper tubing connecting to the underdash a/c box.