Question about 2000 Chevrolet Blazer

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No heat in 2000 chevy lazer just replaced thermostat

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None of these solutions are just telling you to bypass the system. I think this person actually wants heat. Ok first make sure the coolant is full. If so and you changed the therostat the heater hosses or the heater core is clogged. Take the heater hoses off going into the fire wall and inspect them for cloggs. Next hook a garden hose up to the heater core from where you took the hoses off. If you turn the hose on the water should flow fast out of the other tube. If not hook it to the other tube and try that (flushing the system) if at tbat point there is water flowing real good hook everything back up and you should have heat if not make sure the vent door is opening to change from hot to cold check for vacum leaks. But if the heater core isn't flowing sowell after the flush you will have to remove the entire dash to repkace the core .

Posted on Sep 27, 2013

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I own a 200 Chevrolet Blazer and I have it for over 4 years mine does the same thing I actually just noticed my heat getting less. My husband found the best way to fix it and the cheapest way to fix it. He takes the tube off the heater and attaches a water hose to it and flushes out the gunk whatever is blocking the hose and after he does that the heat works great. No cost and if I wanted to I could do it because its so easy. My husband did some searching on the internet and a person that this happens all the time to let me husband know. If you need more info let me know I can ask my husband he isn't home at the moment I so I don't have exact details. Thanks Amy

Posted on Dec 27, 2008

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As mosthated says, it's common in these. Bypassing the core "fixes" the overheating problem in summer, but you'll still have no heat. The orange coolant clots after awhile. It's definitely the heater core if you heard a running water sound under the passenger side dash (the start of your clog). If you wait until summer, the constant heat may clear it out. Have it drained, flushed and filled then. Just be careful. The clog can cause overheating. The core is cheap. It's the labor that'll cost you.

Posted on Dec 27, 2008

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The chevy blazers are known for needing heater cores, have you had this car for along time or is this your first winter owning it... because the heater cores are real hard to put in the blazers so alot of people bypass them (disconnect them) so they dont leak all the antifreeze out...

Posted on Dec 25, 2008

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