Heater sux and low coolant light barely visable
Thread Starter
Launching!
Joined: Aug 2012
Posts: 259
Likes: 0
From: Johnstown, Pa
Heater sux and low coolant light barely visable Hi guys I guess this is a good spot for the thread. I have a 95 Firebird Formula
5.7LT1 Automatic. Runs good doesn't overheat or anything but the low coolant light is on but just barely, and my heat sucks terribly it gets lukewarm but thats about it. I live in PA in the mountains so this is quite shitty. hell i went for about a half hour ride and i still had Frost on the window!! Also I turn on the Rear Defrost and it either does nothing or comes on for about 30 sec and shuts back off? WTF
5.7LT1 Automatic. Runs good doesn't overheat or anything but the low coolant light is on but just barely, and my heat sucks terribly it gets lukewarm but thats about it. I live in PA in the mountains so this is quite shitty. hell i went for about a half hour ride and i still had Frost on the window!! Also I turn on the Rear Defrost and it either does nothing or comes on for about 30 sec and shuts back off? WTF
Low coolant light is a common problem, just the sensor on the radiator. I would try to flush the heater core or just replace it. Some people just flush and it can may work but these cars are getting up there in age so replacing it would probably be best
+your heater core is clogged. I don't know of many who actually have the heat flush work on old stock heater cores. They are almost always to far gone.
The flush worked on my car for a day. Another member recently had the same experience on here. Best thing would be to just replace it now and only dig into it once.
If your coolant is topped off properly you can ignore the light or unplug the sensor. Don't think I've had a f body with one plugged in
The flush worked on my car for a day. Another member recently had the same experience on here. Best thing would be to just replace it now and only dig into it once.
If your coolant is topped off properly you can ignore the light or unplug the sensor. Don't think I've had a f body with one plugged in
Thread Starter
Launching!
Joined: Aug 2012
Posts: 259
Likes: 0
From: Johnstown, Pa
yeah i was thinkin prob heater core. the one hose closer to the engine is hot hot but the other is only barely warm. I thought maybe the light had something to do with it.
I changed one out on my 86 and it was a super pain in the ***. how bad are they in the newer ones?
I changed one out on my 86 and it was a super pain in the ***. how bad are they in the newer ones?
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Don't yank that dash just yet - Try this first:
Disconnect your two coolant hoses that enter and exit the H/Core, use a funnel attached to one of the hoses, and fill the H/Core with radiator flush - undiluted. Let it stand for an hour in the core, then flush it out with H20 - it worked for me!
Good luck!
Disconnect your two coolant hoses that enter and exit the H/Core, use a funnel attached to one of the hoses, and fill the H/Core with radiator flush - undiluted. Let it stand for an hour in the core, then flush it out with H20 - it worked for me!
Good luck!
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Brett Foote Thread Starter
Launching!
Joined: Aug 2012
Posts: 259
Likes: 0
From: Johnstown, Pa
might be worth trying since i am a little tight right now. would a 96 camaro v6 heater core be the same part. I am not running the camaro now. and i no the heat works awesome in that. Checked autozones website and its showing same part number. Just seeing if anyone has actually tried this
TECH Veteran
Joined: Dec 2008
Posts: 4,145
Likes: 61
From: Little Rock, AR
Flushing the core fixes 99% of no heat complaints. The heater core is the same for all models 93-02.
Thread Starter
Launching!
Joined: Aug 2012
Posts: 259
Likes: 0
From: Johnstown, Pa
ok so i started to get all the air out of the lines. figured i would start here. I was opening and closing the bleeder on the thermostat housing and the one on the heater hose. also popped the cap off a few times. I think i may have got the distributor wet b/c the next morning i stopped to get gas and on the way home after fueling up i have a really bad misfire/pop. I put some dry gas in the car and put more gas from a different station as well as some octane booster. It kinda seemed to help.. but i still have a msis. I looked under the car and it seems to be a bit wet around the distributor. could I have screwed up the optispark or u think it may just be bad gas!?
Joined: Jul 2007
Posts: 2,861
Likes: 4
From: Ringoes/Flemington, New Jersey
Flushing the core fixes 99% of no heat complaints. The heater core is the same for all models 93-02.
+1 to the rear defroster relay
Teching In
Joined: Jan 2011
Posts: 35
Likes: 0
From: Missouri
I have had the exact same two problems in my camaro. I tried to flush the heater core awhile back and it worked for about a day...
Good to know about the relay for the defroster though. I wondered why that kept switching off...
Good to know about the relay for the defroster though. I wondered why that kept switching off...
Make sure you don't have a stuck open t-stat. That will cause low heat.
TECH Regular
Joined: Oct 2011
Posts: 407
Likes: 2
From: Keller Tx
I tried blasting mine with water. It lasted a day then I got creative and poured some of that CLR in it and let it soakin the core for a couple hours. It lasted for a two days. I changed the core.
Thread Starter
Launching!
Joined: Aug 2012
Posts: 259
Likes: 0
From: Johnstown, Pa
thats where i am heading next. I burped the entire system and its a bit warmer but i really think the core needs changed. so pick up the heater core and the rear defog relay. soon
