Burning smell when I turn on the heat - MustangForums.com



4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Reply
 
 
 
Thread Tools Search this Thread
Old 02-29-2008, 04:20 PM   #1
sliek0722
2nd Gear Member
Thread Starter
 
Join Date: Apr 2007
Posts: 312
Default Burning smell when I turn on the heat

Ok it's getting that bad now. Everytime I turn on the heat I get a horrible burning smell. The engine doesn't overheat but just now I was afraid the car was on fire. What is causing this and how do I fix it?
sliek0722 is offline   Reply With Quote
Old 02-29-2008, 04:41 PM   #2
Subotai_95
4th Gear Member
 
Join Date: Feb 2008
Location: Charlottesville, VA
Posts: 1,447
Default RE: Burning smell when I turn on the heat

I couldn't really say for sure without being to tell what kind of burning smell it is.. Does it smell like burning electrical insulation? Only thing I could think of would be to check out the heating element to make sure it's not bad, or that maybe there isn't a short in the lead to the heater.. Don't know if that helps any..
Subotai_95 is offline   Reply With Quote
Old 02-29-2008, 05:45 PM   #3
swooshonln
3rd Gear Member
 
Join Date: May 2007
Location:
Posts: 511
Default RE: Burning smell when I turn on the heat

does it happen w/ the AC on, or is it soley just the heat? That would at least rule out it being your fan motor, or any wiring dealing with the fan motor/AC side of the eletrical system

that would pin point it to at least a specific area


The heaters use the coolant from the engine to heat the car right? Its not an eletrical "heater"?
swooshonln is offline   Reply With Quote
Old 02-29-2008, 06:02 PM   #4
Subotai_95
4th Gear Member
 
Join Date: Feb 2008
Location: Charlottesville, VA
Posts: 1,447
Default RE: Burning smell when I turn on the heat

Quote:
ORIGINAL: swooshonln

does it happen w/ the AC on, or is it soley just the heat? That would at least rule out it being your fan motor, or any wiring dealing with the fan motor/AC side of the eletrical system

that would pin point it to at least a specific area


The heaters use the coolant from the engine to heat the car right? Its not an eletrical "heater"?
I don't know how you'd use anti-freeze to heat the car, convection heating like that would be WICKED inefficient.. I don't know, you could be right, but I'm thinking the coolant wouldn't keep the heat long enough to be of any use to a heater, that's why they use ethylene glycol in it.. Very low specific gravity which enables it to give off heat quickly, hence stay cooler to cool the engine down.. I could be wrong, but I'm fairly sure most heaters have some kind of heating element..

Subotai_95 is offline   Reply With Quote
Old 02-29-2008, 06:38 PM   #5
sliek0722
2nd Gear Member
Thread Starter
 
Join Date: Apr 2007
Posts: 312
Default RE: Burning smell when I turn on the heat

I'm really afraid to try it now because if it's an electrical problem, I'm afraid the car will catch on fire. That coudl be disasterous if it hits the fuel line and then the car explodes. It's way past warranty lol. And I can't afford taking a total loss and needing a new car.
sliek0722 is offline   Reply With Quote
Old 02-29-2008, 07:09 PM   #6
Subotai_95
4th Gear Member
 
Join Date: Feb 2008
Location: Charlottesville, VA
Posts: 1,447
Default RE: Burning smell when I turn on the heat

LOL, I wouldn't go THAT far.. I don't think the car's going to blow up, but I'd definitely have somebody you trust look at the heater to make sure it's not shorting anywhere as soon as you get the chance.. Because you're going to get SOME of that hot-type smell from a heater, that's just normal, but it shouldn't smell like something's burning when you turn it on.. If indeed it IS shorting somewhere, that could damage the electrical system, and that isn't exactly cheep to fix unless you're an electrician.. lol
Subotai_95 is offline   Reply With Quote
Old 02-29-2008, 08:42 PM   #7
bullitt15
2nd Gear Member
 
Join Date: Oct 2006
Location: michigan
Posts: 460
Default RE: Burning smell when I turn on the heat

subotai, our cars do use coolant to heat the cabin. coolant flows to the heater core which is basically a radiator and air flows through that and heats the cabin.
it is probably just the plastic ducting giving off that smell. its most likely if the plastic is getting too hot its probably near the heater core that its happening.
and i assure you your not in danger of the car burning. if you want to resolve the problem you'd have to take apart the heat vents and diagnose the problem. and im sure its a pain in the *** so that means labor would be alot of $$, like $300+ expensive for labor alone.
bullitt15 is offline   Reply With Quote
Old 02-29-2008, 10:33 PM   #8
aode08
5th Gear Member
 
Join Date: Oct 2005
Location: Ohio USA
Posts: 4,616
Default RE: Burning smell when I turn on the heat

Blower motor resistor, check it and see if its burnt up or the motor itself, very easy to spot
aode08 is offline   Reply With Quote
Old 03-01-2008, 02:42 AM   #9
swooshonln
3rd Gear Member
 
Join Date: May 2007
Location:
Posts: 511
Default RE: Burning smell when I turn on the heat

Quote:
ORIGINAL: Subotai_95

Quote:
ORIGINAL: swooshonln

does it happen w/ the AC on, or is it soley just the heat? That would at least rule out it being your fan motor, or any wiring dealing with the fan motor/AC side of the eletrical system

that would pin point it to at least a specific area


The heaters use the coolant from the engine to heat the car right? Its not an eletrical "heater"?
I don't know how you'd use anti-freeze to heat the car, convection heating like that would be WICKED inefficient.. I don't know, you could be right, but I'm thinking the coolant wouldn't keep the heat long enough to be of any use to a heater, that's why they use ethylene glycol in it.. Very low specific gravity which enables it to give off heat quickly, hence stay cooler to cool the engine down.. I could be wrong, but I'm fairly sure most heaters have some kind of heating element..

have you ever touched anything that coolent runs through? it stays hot... for hours.

look under your hood, passenger side fire wall, youll see two black hoses. They are right over the last spark plug on the passenger side. Thats where the coolant goes into the heater core... which is what heats the heater. there isnt an eletric "heater", just a fan that blows over a radiator type thing.
swooshonln is offline   Reply With Quote
Old 03-01-2008, 10:59 AM   #10
Mark99GT
4th Gear Member
 
Join Date: Feb 2004
Location:
Posts: 1,895
Default RE: Burning smell when I turn on the heat

Yeah, theres no heating element, just hot coolant.

Take swooshonin's advice and turn the ac on. If you've got that burning smell still its probably a fan motor or something electrical.

Maybeyou've got some kind of **** on the heater core that's burning off. Not really sure how that would happen as its tucked away, but I guess its possible.
Mark99GT is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
72 Cobrajet, not a Mustang though SSRFUZZY Members Other Vehicles 6 01-06-2016 08:22 PM
Gas building up in throttle body TorinoCobra070 SVT Forums 8 09-18-2015 10:34 AM
AODE Woes Pyrate Dave 5.0L (1979-1995) Mustang 8 09-10-2015 07:30 PM
alternator. so hot will burn your hand on 2004 3.9 v6 mrmrultimate Texas Regional Chapter 2 09-10-2015 09:43 AM
96 V6 Gauges (Temp) 96stang3.8 V6 (1994-2004) Mustangs 1 09-10-2015 06:42 AM


Tags
2001, 96, antifreeze, automobile, burning, car, electrical, engine, fan, heat, heater, mustang, smell, turn, turns, weird

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -5. The time now is 03:42 AM.