So finally got the heater core out again, and got the black plastic plug out of the passageway. I can't believe this was stuck so far into the heatercore. I'm surprised the restricted flow hasn't overheated the engine. Heat is supercharged now. So glad to have it working again. Thanks to everyone ...

That's crazy, it's definitely manufactured this way. It's smooth with a cleanly drilled hole. Is this just a pilot hole and they never came back over it? Man I've been screwing with the heating system for 3 years and it's all because of this. Not happy with sweedish car parts. I guess I figured out ...

That's interesting. I assumed I would need some sort of valve to ensure only air was getting out, but a t seems like an easy solution. I don't think the heater core is blocked because when I took it out I ran water through it and there was no resistance. I did notice that the inlet hole of the ...

So I've been chasing down a no / poor heat problem on a 96 850 na with 250k. The cars heater core (a sweedish car parts eBay replacement) gurgles and bubbles like mad when pressing the gas. Sounds like a ton of air is in the heater core.

I took the heater core out again and verified it's not ...

Thanks for the quick reply Lee. Much appreciated. I was able to manually set the defrost arm to a position that allows airflow to the windshield, but since the mcc know won't move it's also going out the front vents. Regardless it's good that at least some air is going towards the windshield even if ...

I'm having a really hard time diagnosing two separate but possibly related issues with heating our 96 850 NA with MCC. Of course I waited until it's 5 degrees out to really dig into it, and I've got more questions than answers.

Around three years ago I replaced the heater core with a sweedish ...

Well that wasn't helpful. The auto parts guys actually got in a big argument on what my problem was, and what part to buy. They hooked up their charging system tested and it came back with good battery but very low. Alternator charging at 13.4 with load but bad voltage regulator. One guy said it was ...

I know they aren't really reliable, but I'll head down there on my way home from work, assuming it gets me there!

Thanks sleddriver, I will do that when I get home tonight. I actually have another puzzling development. I just took the car to grab some lunch. Started and drove fine. I also had an errand to run, so I started and stopped it a total of 3 times, with no problems whatsoever. I got home and decided to ...

Thanks for the info Neil. I believe the battery is sealed. It sounds like I should go ahead and order the Voltage Regulator to see if that makes a difference. Is there a way to test the ignition switch at all, or should I also just order one and replace it? Is junkyard OK or do I have to spring for ...