Heater problem!

paulmicin · 02-17-2008, 09:16 PM

My heater recently stopped working and i've pinpointed the problem to this valve.

I think the vacuum solenoid is broken or the fuse is blown? Can anyone tell my how to fix it.
Thanks in advance.

Pretaco · 02-18-2008, 02:29 PM

Do you have vacuum at that line on top of the valve with the heater on?
Does your heater blower work?
Do you get power and ground at the vsv under that valve with the heater on?
Does your engine warm up to normal operating temperature?
Ray.

paulmicin · 02-19-2008, 12:10 PM

There is no vacuum at the top of the valve with the heater on. The heater works perfectly when i bypass the vsv by plugging the vacuum hose directly onto the valve. The car does warm up to normal operating temperature. I'm going to check the power and ground right now to see if the solenoids bad or if its getting no power.

mrnickleye · 02-20-2008, 03:57 AM

The VSV only shuts water off to the heatert core when the temp is set to 65*. So........... plug the vacuum directly to the water valve and forgert about it.

Trust me, I know these cars like the back of my hand !

paulmicin · 02-20-2008, 05:58 AM

Alright thats how its set up right now, i guess ill just leave it like that. Thanks

ddmcse · 07-18-2008, 09:58 PM

paulmicin is that your engine in the picture ?

paulmicin · 07-19-2008, 12:21 AM

Yes it is. Why do you ask?

02-17-2008, 09:16 PM	#1
paulmicin 3" Exhaust Join Date: Oct 2007 Location: Norwalk, Ca Posts: 52	Heater problem! My heater recently stopped working and i've pinpointed the problem to this valve. I think the vacuum solenoid is broken or the fuse is blown? Can anyone tell my how to fix it. Thanks in advance.

02-18-2008, 02:29 PM	#2
Pretaco 3" Exhaust Join Date: Dec 2007 Location: Glendale, AZ Posts: 126	Do you have vacuum at that line on top of the valve with the heater on? Does your heater blower work? Do you get power and ground at the vsv under that valve with the heater on? Does your engine warm up to normal operating temperature? Ray. __________________ '88 Supra Targa 5 speed w/ '90 7M-GTE Currently Running Good For Sale: Light blue body parts, Blue interior parts all from '90 supra targa turbo manual. Also for sale: R154 trans, brake pedal, master cylinder, booster, abs actuator, sensors, abs ecu, driveshaft, 3.90 lsd rear end, radiator, wiring, speedo cable, 8 saw blade wheels, '88 ecu, relays, cruise control actuator (bad cable), empty fuel tank, etc....

02-20-2008, 03:57 AM	#4
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	The VSV only shuts water off to the heatert core when the temp is set to 65*. So........... plug the vacuum directly to the water valve and forgert about it. Trust me, I know these cars like the back of my hand ! __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

07-18-2008, 09:58 PM	#6
ddmcse 500whp yet? Join Date: Jun 2005 Location: CT U.S.A. Posts: 966	paulmicin is that your engine in the picture ? __________________ 300+ RW HP Dyno run, jdm,mod turbo,3"exh,electfan,greddyboost Blown HeadGasket info My Supra KiXGaS

07-19-2008, 12:21 AM	#7
paulmicin 3" Exhaust Join Date: Oct 2007 Location: Norwalk, Ca Posts: 52	Yes it is. Why do you ask? __________________ 1989 5 speed turbo Koyo radiator Spearco intercooler HKS bov Greddy e-01 boost controller 245's all around Slotted + drilled all around 3" straight piping turbo-back, 4" tip Lowering springs HKS mushroom air filter

02-19-2008, 12:10 PM	#3
paulmicin 3" Exhaust Join Date: Oct 2007 Location: Norwalk, Ca Posts: 52	There is no vacuum at the top of the valve with the heater on. The heater works perfectly when i bypass the vsv by plugging the vacuum hose directly onto the valve. The car does warm up to normal operating temperature. I'm going to check the power and ground right now to see if the solenoids bad or if its getting no power.

02-20-2008, 05:58 AM	#5
paulmicin 3" Exhaust Join Date: Oct 2007 Location: Norwalk, Ca Posts: 52	Alright thats how its set up right now, i guess ill just leave it like that. Thanks

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
another heater problem	nicnet	MKIII Supra	16	12-05-2007 10:18 PM
heater problem..... cold like heck...	hangsupra	MKIII Supra	9	01-28-2007 05:35 PM
Heater Problem	octron	Non-Generation Specific Questions	0	04-09-2006 07:32 PM
Heater Problem	scruffboy	Non-Generation Specific Questions	5	01-24-2006 11:42 PM
Mk111 Heater Problem 'help'	pete2bram	Non-Generation Specific Questions	2	10-05-2005 09:15 PM