Heater takes forever to produce hot air

White 89 · January 24th, 2008, 01:30 PM

Anyone know how or why this is happening. I just put a new thermostate in the thing the other day. Still takes forever for hot air to come out. It does get hot but takes about a 1/2 hour of driving. Then I'll finally get some hot air going.

Juggalo_X · January 24th, 2008, 01:30 PM

Thermostat stuck open im in the same situation right now. just havnt gotten around to fixing it.

dr.gonzo! · January 24th, 2008, 01:37 PM

get your cooling system flushed, could be a clog not letting fluid flow through the heater core. I just replaced my therm too and it helped a little but still takes some time. also what temp did you go with?

93hatch · January 24th, 2008, 01:50 PM

the block and heads are cast iron, takes them awhile to heat up

Juggalo_X · January 24th, 2008, 01:50 PM

Originally Posted by dr.gonzo

get your cooling system flushed, could be a clog not letting fluid flow through the heater core. I just replaced my therm too and it helped a little but still takes some time. also what temp did you go with?

its not the heater core he said it takes 1/2 an hour for his engine to get to normal heat range. im betteing the new one is either opening to soon or its bad too.

White 89 · January 24th, 2008, 01:51 PM

I went with a brand new 192 factory Thermo. It's been on the car as of the last week in Dec 2007. I put the spring side into the intake. Hope I got that right.

Other thing is when I first start up the car. I can hear the water flowing thru the heater core. Isn't that wierd.

Juggalo_X · January 24th, 2008, 01:54 PM

Originally Posted by White 89

I went with a brand new 192 factory Thermo. It's been on the car as of the last week in Dec 2007. I put the spring side into the intake. Hope I got that right.

Other thing is when I first start up the car. I can hear the water flowing thru the heater core. Isn't that wierd.

the thermosdat should be closed when u first start the engine so u should hear the pump pushing water to the core yet. lemme check if u installed the correct way.

White 89 · January 24th, 2008, 01:55 PM

another thing i should mention. Sometimes and it didn't do this before I put the new thermo in. My temp gauge will sky rocket to around 220 with very cold air blowing then I'll turn it off then the temp will drop very fast to normal range I'll turn the heater back on and I'll have warm air. Wish I could show someone. Everyone thinks I'm crazy but it really does happen. Not all the time but it has happened a few times.

nba1341 · January 24th, 2008, 01:56 PM

Originally Posted by Juggalo_X

the thermosdat should be closed when u first start the engine so u should hear the pump pushing water to the core yet. lemme check if u installed the correct way.

both of your posts have got me confused

do you personally know this guy?

Juggalo_X · January 24th, 2008, 01:56 PM

you have the spring facing the engine then that is correct.

Juggalo_X · January 24th, 2008, 01:57 PM

Originally Posted by nba1341

both of your posts have got me confused

do you personally know this guy?

i was refering to consulting my Mustang repair manual lol

Juggalo_X · January 24th, 2008, 01:58 PM

Originally Posted by White 89

another thing i should mention. Sometimes and it didn't do this before I put the new thermo in. My temp gauge will sky rocket to around 220 with very cold air blowing then I'll turn it off then the temp will drop very fast to normal range I'll turn the heater back on and I'll have warm air. Wish I could show someone. Everyone thinks I'm crazy but it really does happen. Not all the time but it has happened a few times.

ok now that is fucked...... can u smell coolant at all in the car?

White 89 · January 24th, 2008, 01:59 PM

Originally Posted by nba1341

both of your posts have got me confused

do you personally know this guy?

A wa???????

Juggalo_X · January 24th, 2008, 02:00 PM

take the thermo out and see if its stuck open and do the boil test to verify it functions in its correct range and not opening to soon.

JBIGBOOTSY · January 24th, 2008, 06:27 PM

Originally Posted by White 89

another thing i should mention. Sometimes and it didn't do this before I put the new thermo in. My temp gauge will sky rocket to around 220 with very cold air blowing then I'll turn it off then the temp will drop very fast to normal range I'll turn the heater back on and I'll have warm air. Wish I could show someone. Everyone thinks I'm crazy but it really does happen. Not all the time but it has happened a few times.

You prolly have alot of air trapped in the engine, just keep topping off the rad.

January 24th, 2008, 01:30 PM	#1
White 89 Enthusiast Join Date: Oct 2007 Posts: 825 iTrader: 0 reviews	Heater takes forever to produce hot air Anyone know how or why this is happening. I just put a new thermostate in the thing the other day. Still takes forever for hot air to come out. It does get hot but takes about a 1/2 hour of driving. Then I'll finally get some hot air going. __________________ 1989 mustang GT 5.0

January 24th, 2008, 01:51 PM	#6
White 89 Enthusiast Join Date: Oct 2007 Posts: 825 iTrader: 0 reviews	I went with a brand new 192 factory Thermo. It's been on the car as of the last week in Dec 2007. I put the spring side into the intake. Hope I got that right. Other thing is when I first start up the car. I can hear the water flowing thru the heater core. Isn't that wierd. __________________ 1989 mustang GT 5.0

January 24th, 2008, 01:55 PM	#8
White 89 Enthusiast Join Date: Oct 2007 Posts: 825 iTrader: 0 reviews	another thing i should mention. Sometimes and it didn't do this before I put the new thermo in. My temp gauge will sky rocket to around 220 with very cold air blowing then I'll turn it off then the temp will drop very fast to normal range I'll turn the heater back on and I'll have warm air. Wish I could show someone. Everyone thinks I'm crazy but it really does happen. Not all the time but it has happened a few times. __________________ 1989 mustang GT 5.0

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January 24th, 2008, 01:30 PM	#2
Juggalo_X I Post Entirely Way Too Much 2001 Mustang 232/CBR600 14+@Slow Join Date: Jan 2007 Location: South Western Ontario Posts: 6,688 iTrader: 0 reviews	Thermostat stuck open im in the same situation right now. just havnt gotten around to fixing it.

January 24th, 2008, 01:50 PM	#4
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	the block and heads are cast iron, takes them awhile to heat up

January 24th, 2008, 01:56 PM	#10
Juggalo_X I Post Entirely Way Too Much 2001 Mustang 232/CBR600 14+@Slow Join Date: Jan 2007 Location: South Western Ontario Posts: 6,688 iTrader: 0 reviews	you have the spring facing the engine then that is correct.

January 24th, 2008, 02:00 PM	#14
Juggalo_X I Post Entirely Way Too Much 2001 Mustang 232/CBR600 14+@Slow Join Date: Jan 2007 Location: South Western Ontario Posts: 6,688 iTrader: 0 reviews	take the thermo out and see if its stuck open and do the boil test to verify it functions in its correct range and not opening to soon.

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