Heater blower rebuild, Preferred method or parts? Options

[Van B]

I got no movement when I put 12v to the wires and trying to spin the fan by hand is a challenge so, I think it’s dead.

Now what to do? I see pelican parts has a Bosch motor only, a Porsche fan+motor assembly, and a URO fan+assembly.

What have you folks done for your heater blower rebuild and how has it worked out? (IMG:style_emoticons/default/poke.gif)

I’ll say up front, I’m biased toward the Bosch motor for two reasons: 1.) It’s a Bosch 2.) I’m not excited about a plastic fan in the engine bay.

Thanks,
Van

[Van B]

well that hasn't really worked on my car so far. I have to put my hand right on the vent to feel the heat. And that's only when I move the top slider mid-way. if I move it further over to turn on the frunk blower, it's totally cold outside air.

I appreciate the feedback and all, but I'm trying to fix the heater blower, not throw it away.

[BeatNavy]

well that hasn't really worked on my car so far. I have to put my hand right on the vent to feel the heat. And that's only when I move the top slider mid-way. if I move it further over to turn on the frunk blower, it's totally cold outside air.

I appreciate the feedback and all, but I'm trying to fix the heater blower, not throw it away.

The top slider is only fresh air. All the way to the left is closed, all the way to the right is wide open and frunk blower on high.

The amount of heat allowed into the cabin is control by the lever between the seats. Do you have that open all the way? If so, and you're still not getting a blast of hot air on downshifts, then there is something else going on. That blower you are so eager to have working is controlled by that lever. All the way up and the relay grounds, turning the blower on. In any other position the heater blower is idle.

[wonkipop]

well that hasn't really worked on my car so far. I have to put my hand right on the vent to feel the heat. And that's only when I move the top slider mid-way. if I move it further over to turn on the frunk blower, it's totally cold outside air.

I appreciate the feedback and all, but I'm trying to fix the heater blower, not throw it away.

The top slider is only fresh air. All the way to the left is closed, all the way to the right is wide open and frunk blower on high.

The amount of heat allowed into the cabin is control by the lever between the seats. Do you have that open all the way? If so, and you're still not getting a blast of hot air on downshifts, then there is something else going on. That blower you are so eager to have working is controlled by that lever. All the way up and the relay grounds, turning the blower on. In any other position the heater blower is idle.

true

but the heater lever between the seats is also doing that typical VW heath robinson contraption where its pulling the cables to the heat control boxes on the heat exchangers.
could be the heater control boxes back there are clagged up on Vans car, corroded shut and not working to let heat flow through.

agree on engine bay blower. its really there to do full blast windscreen defrosting.
hell, they got so cheap on 74 model years they only did the one hose fan biased to the drivers side! (IMG:style_emoticons/default/smile.gif)

i've got the whole system working nice on my car (74 1.8 same as Vans) and must admit i rarely pull the lever up between the seats all the way to engage the blower fan. gets way too hot.
the usual bleed off the engine cooling fan casting usually is enough to blow the hot air through.

could also be that the two flaps off the engine blower casting itself are clagged shut.
you have to get the piece of tin ducting off that goes to the heat exchanger to check those flaps.

those flaps and the heater control boxes off the end of the heat exchangers are the most likely things to be not operating and be stopping the heat flow.

its a nice idea to rebuild the engine bay blower, but its not going to be stopping a good flow of heat into the car. they didn't even have engine bay blowers on type 3s and type 1s and the bleed off the engine cooling fan was enough to incinerate your ankles as it came out of the little vents down in the sills on those VWs. i remember. the whole thing worked pure and simple off the cable operated levers between the seats (but was very dependent on engine revs - i guess the blower fan evened it all out).