no air or heat....help!

lilman87 · 10-27-2005, 08:38 PM

i was thinkin about changine the thermostate anyway so that will be good if it helps the heater. when i bought the car the guy said that there was a hole in one of the a/c lines so how would i go about testing that. that would probly be the reason that i would be low on freon.

supra_91 · 10-28-2005, 12:13 AM

find the line with the hole in it and replace it

lilman87 · 10-28-2005, 03:33 AM

anysugestions on how to find the line with the hole in it?

ddmcse · 10-28-2005, 12:28 PM

your heater problem is a broken valve that can be by-passed . i forget the details right now . the valve is passenger side (U.S) on the firewall it's one little swap of tubes and you'll get heat . research online you'll find it.
it's a vac switch and with no switch there's no hot water flowing into the heater core

mrnickleye · 10-29-2005, 07:16 AM

A/C...if its still R12 freon, you probably can't get any from a parts house. You will probably need to take it to a shop. They can check out the system for about $50 (my shops price).

Heater...while engine is running, just unplug the vacuum line from the engine, going to the VSV (wires to it) by the heater water valve, then plug it into the heater valve. Valve should work, you'll see it move. Normal operation is that water always flows thru the heater core, except when the temp controls are set to 65*.

10-28-2005, 12:13 AM	#2
supra_91 Lexus & 550's Join Date: Sep 2005 Location: Illinois Posts: 521	find the line with the hole in it and replace it __________________ 91 N/A automatic supra;K&N FIPK;2.5" custom exhaust;no cat;pacesetter header;eibach springs;tokico "blues";MKIV TT rims

10-28-2005, 12:28 PM	#4
ddmcse 500whp yet? Join Date: Jun 2005 Location: CT U.S.A. Posts: 966	your heater problem is a broken valve that can be by-passed . i forget the details right now . the valve is passenger side (U.S) on the firewall it's one little swap of tubes and you'll get heat . research online you'll find it. it's a vac switch and with no switch there's no hot water flowing into the heater core __________________ 300+ RW HP Dyno run, jdm,mod turbo,3"exh,electfan,greddyboost Blown HeadGasket info My Supra KiXGaS Last edited by ddmcse; 10-28-2005 at 12:31 PM.

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10-27-2005, 08:38 PM	#1
lilman87 Stock Join Date: Oct 2005 Location: Illinois Posts: 20	i was thinkin about changine the thermostate anyway so that will be good if it helps the heater. when i bought the car the guy said that there was a hole in one of the a/c lines so how would i go about testing that. that would probly be the reason that i would be low on freon.

10-28-2005, 03:33 AM	#3
lilman87 Stock Join Date: Oct 2005 Location: Illinois Posts: 20	anysugestions on how to find the line with the hole in it?

10-29-2005, 07:16 AM	#5
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	A/C...if its still R12 freon, you probably can't get any from a parts house. You will probably need to take it to a shop. They can check out the system for about $50 (my shops price). Heater...while engine is running, just unplug the vacuum line from the engine, going to the VSV (wires to it) by the heater water valve, then plug it into the heater valve. Valve should work, you'll see it move. Normal operation is that water always flows thru the heater core, except when the temp controls are set to 65*.