93 Roadmaster auto climate control - Chevy Impala SS Forum
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 11-21-2016, 12:08 PM Thread Starter
Senior Member
Join Date: Jul 2007
Location: Manitoba
Posts: 502
93 Roadmaster auto climate control

The blower motor isn't working. The fan works (adding remote power), the relay checks out, the resistor block seems to be okay, and what appears to be the problem is no signal coming from the automatic climate control for the fan speeds. Only gets 0.5V at the blower motor connection.

I know these climate control modules have a self-diagnostic capability. Anyone know how to look into this to see if the blower motor circuit is working properly?

'93 Roadmaster wagon, 3.23 and posi. All stock except for Monroe SS shocks, WS6 front sway bar and Crown Vic bolt-on rear bar. AC Delco O2 sensor and spark plugs - MANDATORY! And now new GM rear LCAs and steering shaft. Air Lift 1000s installed. Also new center link and idler arm for MUCH less wander. Tie rods. Steering box adjusted for bearing preload and sector shaft interference.

** For sale in exchange, power vent windows and motors for wagon.
Moparman is offline  
Sponsored Links
post #2 of 3 (permalink) Old 11-21-2016, 12:40 PM
Senior Member
Shilaeli Hugger's Avatar
Join Date: Jun 2002
Location: Newcomerstown,Oh
Posts: 2,027
I had similar problem with my 92. The plug for the resistor pack wasnt makin good contact so i bent the plugs a lil to get it to work. Never did check power from hvac once i got it workin

96 BBB 9c1. Rebuilt out of lets just say north of 30 cars.
94 MGR L99. Met a bridge.
92 White L03. Ran to death.
94 OSP 9C1. Lawn ornament.
91 Silver L03. Whales on ice is sad.
94 Black 9c1 clone. Sacrificed.
92 DCM to flat black L03 RMW. Blowed up... twice.
96 Black Woody RMW. Cannibalized.
92 Grey RMS L05. New daily driver.
"i built it one piece at a time, and it didn't cost me a dime!" Johnny Cash
Shilaeli Hugger is offline  
post #3 of 3 (permalink) Old 11-21-2016, 04:26 PM
Senior Member
Fred Kiehl's Avatar
Join Date: Feb 2009
Location: Largo, FL 33774
Posts: 10,868
The electronic climate controls have a transistorized fan control unit. If it fails, the motor will not run. At some point the fan control will probably fail. The only remedy is to replace it. Having a spare is a good way to check the operation. You can disconnect the one in the car, and hook up the other one. If the fan runs, you have found the problem. New modules are extremely expensive and the aftermarket fans do not move air nearly as well as the OEM units.

I also had a fan that would work with an outside source of power, but not in the car. The brushes in the motor wear out, and if it is in the wrong position for too long, they no longer make contact with the commutator. The motor is not rebuildable. It is also a herculean task to remove the fan from the shaft.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
Fred Kiehl is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Chevy Impala SS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome