I have a problem with the ac blower slowing down or stopping after 30 minutes or so. Replaced blower motor and still have the same problem. Is this an indication of the control panel going bad? I have seen rebuilt controls for sale but do not know what problems they inherently have. Could it be a bad solder joint inside? Thanks in advance.

 

What troubleshooting steps led you to believe the blower was bad?

 

None really. I just thought it was the quickest way to eliminate it first.

 

I had a similar issue where the blower motor would run for awhile and then stop abruptly. I'd turn off the A/C and it would sometimes come on again and run for an hour, and other times it would not blow again. A friend let me try a working dual HVAC control and it had the same problems. Some research on the forum indicated that it might be an issue with the blower resistor. Swapped it out and now it works great again. It's not the easiest resistor to change, but with some patience it'll come out. Tough to reach the back screw as it's really tight, definitely need to remove the blower motor when trying to access that back screw.

 

If you have automatic dual zone HVAC, you did not replace the blower resistor,,,,,rather.....you would have replaced the "Blower Motor Control Processor". The blower motor resistor is only on manual HVAC C5s

 

Lucky is 100% correct!

IF,,,,,,,,,, You go to the parts store or look online and find a blower motor controller for $40 ish bucks or less, ITS NOT THE ONE FOR DUAL CLIMATE CONTROL! The blower motor control processor for dual climate control is significantly more expensive! They are in the hundreds of dollars if they are still available new.

I recently helped another forum member with this same issue, He removed the blower motor control processor, plugged it back in and his started working normal again. The cover on the module can be removed to inspect the processor electronic circuit board inside. Sometimes the two transistors inside the module short and the printed circuit board traces melt and or vaporize.

BC

 

Sorry I didn't get back to everyone sooner. Thanks for the Information. Where would I find this control board or is it the panel in the console?

 

Find the fan motor and follow the wires to the control module PLUG PORT. Part of the module sticks into the air box for module cooling. The rear fasteners are in a slotted part and do not need to be fully removed for module removal. SEE THIS LINK FOR THE MODULE DESCRIPTION AND PICTURE:
https://www.corvettecentral.com/c5-9...control-455103


For a 2001 C5 Corvette with dual climate control, the correct component is the blower motor control module, not a simple resistor. The following are part numbers associated with this module, which fits C5 Corvettes from 1997 to 2004 with automatic or dual-zone A/C (RPO code CJ2).
Primary OEM part numbers
These are the main part numbers you will encounter for the original equipment module:

• 89019166
• 52479971

Other cross-referenced and replacement numbers
These numbers are also compatible with the 1997–2004 C5 dual climate control system:

• 16256018
• 09352181
• 10345293

Where to buy
Due to the age of the vehicle, you may need to look for this part at specialized vendors.

• Corvette Central lists this part as #455103.
• Corvette salvage yards may have tested used modules, as seen on eBay.
• Remanufactured units are available through various automotive parts suppliers on eBay.

Before you buy

• Verify your vehicle's A/C system. Make sure you have the automatic dual-zone system. The blower control module for manual A/C is different.
• Consider replacing the blower motor. It is often recommended to replace the blower motor at the same time as the control module because removing the blower motor is necessary to access the module.

 

Replacements are available at Rock and other part vendors. A/C Delco, Wells, and Standard Motor Parts units.
If you need help with where it is in the car, as with many such questions YouTube is your friend.

 

A friend just had blower motor issues. I recommended that he inspect all the components. Just unplugging and reconnecting the connectors resolved the issue. A poor connection seemed to be his issue.