Heater control valve vacuum issue 1989 Dynasty
09-21-2013, 01:52 PM
#1
Mopar Fan
Thread Starter
Heater control valve vacuum issue 1989 Dynasty
I do not get a vacuum signal to reach a new heater control valve.
Hence, hot engine coolant continuously enters the passenger interior and heats the passenger interior on hot days.
Can anyone shed light as to the vacuum source?
I figured that sliding the dashboard temp control lever from side to side or depressing the A/C button may/should trigger some vacuum action at the heater control valve.
Neither of these actions have made vacuum appear at the heater control valve.
In the meantime, I pinched off the heater hose to stop hot coolant from entering the cabin heater core area.
I cannot find a reference text on this subject.
The Haynes 1988-1993 Repair Manual appears to be silent on this subject.
Is there a connection between the dash temperature control panel and a vacuum source?
Hence, hot engine coolant continuously enters the passenger interior and heats the passenger interior on hot days.
Can anyone shed light as to the vacuum source?
I figured that sliding the dashboard temp control lever from side to side or depressing the A/C button may/should trigger some vacuum action at the heater control valve.
Neither of these actions have made vacuum appear at the heater control valve.
In the meantime, I pinched off the heater hose to stop hot coolant from entering the cabin heater core area.
I cannot find a reference text on this subject.
The Haynes 1988-1993 Repair Manual appears to be silent on this subject.
Is there a connection between the dash temperature control panel and a vacuum source?
09-21-2013, 10:38 PM
#2
I know nothing of these cars, but the heater valve HAS to be hooked to the dash control. It may also go through the temp control lever / **** if that is physically separate
Heck, LOL this time of year you are probably about ready for heat again?
Heck, LOL this time of year you are probably about ready for heat again?
06-16-2014, 01:29 PM
#3
Mopar Fan
Thread Starter
I found a photo of the heater and A/C Temperature Control Switch on eBay and it shows several colored vacuum hoses exiting the rear of the control switch . I guess that the vacuum hoses will control the blend door and will control the heater vacuum switch in the engine bay .
I do not have knowledge of the OEM setup / function.
can anyone shed light on the 9 vacuum hoses that enter/ exit the back of the Temperature Control Switch ?
The vacuum hoses in the eBay photo are light green, dark green , two yellow, two red , brown ,2 black .
I do not have knowledge of the OEM setup / function.
can anyone shed light on the 9 vacuum hoses that enter/ exit the back of the Temperature Control Switch ?
The vacuum hoses in the eBay photo are light green, dark green , two yellow, two red , brown ,2 black .
06-23-2014, 06:10 PM
#8
My air in my 98 Van has never worked properly. Not worth the effort - need to take the complete dash apart..
Is yours R12 or R134a ????
Is yours R12 or R134a ????
Last edited by TVLynn; 06-23-2014 at 06:13 PM.
06-23-2014, 08:10 PM
#9
Mopar Lover
Oh Come on Lynn.... Pull the windsheild out and get that Bit&% pulled apart and get it retroed to R134... The older we get the more we need Air.....
Like I'm One to talk... I have never had air in my truck... My Warlock never came with it.... Cant be spoiling the Rednecks.....
Like I'm One to talk... I have never had air in my truck... My Warlock never came with it.... Cant be spoiling the Rednecks.....
06-24-2014, 04:10 AM
#10
98 is factory R134 already Just bought a case of 12 from ebay $70. Hard to get anything in Ca. All they want to sell you are the big 24 oz ? bottle kits for $40.
Had to put a can of R12 in my daily driver 88 olds quad 4. Hay it was free !!!! has 136K
Had to put a can of R12 in my daily driver 88 olds quad 4. Hay it was free !!!! has 136K
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