Blower motor problem
Thread Starter
Heel & Toe
Joined: Sep 2008
Posts: 18
Likes: 0
From: St. Charles MO
Blower motor problem
I've only had my 95 for about 4 months. I don't recall having any problems with the blower motor when I was using the AC, but now with the heater it will not always turn on.
It has the electronic climate control.
First question: With the heater in manual mode, should the fan turn on regardless of engine temp, or does the engine need to get to a certain temp before it will come on? I would think that's only in the "auto" mode, correct?
The blower usually doesn't come on until the engine is at about 185*, but even then about 2/3 of the time it still doesn't come on. Sometimes, after about 30-60 minutes of driving all of sudden it decides to turn on.
All of the buttons on the control panel are working, and the little bit of ram air that flows due to the cars speed will come out of the selected location and be of a temp corresponding to what temp is set. The fan speed indicator will cycle from 1-10. No unusual noise when the blower does decide to operate.
Any troubleshooting suggestions?
It has the electronic climate control.
First question: With the heater in manual mode, should the fan turn on regardless of engine temp, or does the engine need to get to a certain temp before it will come on? I would think that's only in the "auto" mode, correct?
The blower usually doesn't come on until the engine is at about 185*, but even then about 2/3 of the time it still doesn't come on. Sometimes, after about 30-60 minutes of driving all of sudden it decides to turn on.
All of the buttons on the control panel are working, and the little bit of ram air that flows due to the cars speed will come out of the selected location and be of a temp corresponding to what temp is set. The fan speed indicator will cycle from 1-10. No unusual noise when the blower does decide to operate.
Any troubleshooting suggestions?
Le Mans Master
Joined: Dec 2004
Posts: 5,789
Likes: 8
From: Myrtle Beach SC
St. Jude Donor '05-'06
When you push the fan up button does the fan come on? That takes it out of auto mode.Since you did not fill out your profile we can't see where you are but if the ambient temp matches the interior temp the fan will be on low speed.
Thread Starter
Heel & Toe
Joined: Sep 2008
Posts: 18
Likes: 0
From: St. Charles MO
Thanks, I didn't think it should be dependent on coolant temp, but wanted to rule that out as a possible problem.
I'm in St. Louis. Temps been in the teens. When I select a higher fan speed, the indicator will increase all the way to 10, but the blower does not respond, but it is not simply a bad blower as it will sometimes work fine. I'm thinking a relay or a connection problem.
I'm in St. Louis. Temps been in the teens. When I select a higher fan speed, the indicator will increase all the way to 10, but the blower does not respond, but it is not simply a bad blower as it will sometimes work fine. I'm thinking a relay or a connection problem.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
The blower gets it's power direct from the battery THROUGH the blower control module ( fancy relay)
These commonly go bad , generally turn blower on at random , even when ign off.
Module is mounted inside the A/c ducting in engine bay.Look for two big weather pak plugs in plate held by three screws.
These commonly go bad , generally turn blower on at random , even when ign off.
Module is mounted inside the A/c ducting in engine bay.Look for two big weather pak plugs in plate held by three screws.
Le Mans Master
Joined: Dec 2004
Posts: 5,789
Likes: 8
From: Myrtle Beach SC
St. Jude Donor '05-'06
Thread Starter
Heel & Toe
Joined: Sep 2008
Posts: 18
Likes: 0
From: St. Charles MO
I appreciate your help. I just wish I could test a $150 part prior to replacing it. When I do a search on heater control module failures, It seems everyone's problem with a bad module is the blower runs with the ignition off. Mine has not done that at all. First I will try cleaning the contacts as you suggested.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
you need to check the blower resistor, which only costs $17 . I have had these go bad on some C3's in the past. When they go out, you usually loose your high speed fan. These are nothing more than metel spun resistors and they carry alot of current. When they go bad, they somply open up like a burnt out fuse. They are easy to visually inspect. If your '95 doe's have this type of resistor, it usually sits right on top of the evaporator housing. But I don't know if your model uses this.
http://www.ecklers.com/product.asp?p...3&dept_id=1155
http://www.ecklers.com/product.asp?p...3&dept_id=1155
Le Mans Master
Joined: Dec 2004
Posts: 5,789
Likes: 8
From: Myrtle Beach SC
St. Jude Donor '05-'06
Thread Starter
Heel & Toe
Joined: Sep 2008
Posts: 18
Likes: 0
From: St. Charles MO
