Please explain HVAC system
Thread Starter
Burning Brakes
Joined: Oct 2011
Posts: 956
Likes: 86
From: McDonough Georgia
Please explain HVAC system
I have an 81.
I replaced all the HVAC stuff including:
fan
blower switch
blower relay
blower voltage regulater on air box
All vacuum lines
All vacuum pods
vacuum switch
and more
I believe the system is not working correctly. I don't know what else to replace.
The low speed fan comes on when the ignition is on. I know this is normal.
But shouldn't the med/high come on when you move the switch? even if the engine isn't running? Mine stays on low. If I fold the brown wire on the voltage regulator on the air box, the low speed stops and nothing runs.
Any sort of advice on this?
I replaced all the HVAC stuff including:
fan
blower switch
blower relay
blower voltage regulater on air box
All vacuum lines
All vacuum pods
vacuum switch
and more
I believe the system is not working correctly. I don't know what else to replace.
The low speed fan comes on when the ignition is on. I know this is normal.
But shouldn't the med/high come on when you move the switch? even if the engine isn't running? Mine stays on low. If I fold the brown wire on the voltage regulator on the air box, the low speed stops and nothing runs.
Any sort of advice on this?
Melting Slicks
Joined: May 2002
Posts: 2,717
Likes: 121
From: Sulphur LA
St. Jude Donor '05-'06,'11,'13-'14,'16,'18,'19,'24, '25
I have an 81.
I replaced all the HVAC stuff including:
fan
blower switch
blower relay
blower voltage regulater on air box
All vacuum lines
All vacuum pods
vacuum switch
and more
I believe the system is not working correctly. I don't know what else to replace.
The low speed fan comes on when the ignition is on. I know this is normal.
But shouldn't the med/high come on when you move the switch? even if the engine isn't running? Mine stays on low. If I fold the brown wire on the voltage regulator on the air box, the low speed stops and nothing runs.
Any sort of advice on this?
I replaced all the HVAC stuff including:
fan
blower switch
blower relay
blower voltage regulater on air box
All vacuum lines
All vacuum pods
vacuum switch
and more
I believe the system is not working correctly. I don't know what else to replace.
The low speed fan comes on when the ignition is on. I know this is normal.
But shouldn't the med/high come on when you move the switch? even if the engine isn't running? Mine stays on low. If I fold the brown wire on the voltage regulator on the air box, the low speed stops and nothing runs.
Any sort of advice on this?
