Fans stayed on
Thread Starter
Intermediate
Joined: Nov 2008
Posts: 27
Likes: 0
From: El Paso TX
Fans stayed on
I have a 1991 corvette coupe with 57,045 miles, when the car reach operating temperature and the primary fans come on it stays and never cut off. It’s these normal or the ECM is malfunctioning. I have changed the coolant TEMP sensor, the fans relays, the Fans coolant sensor and the thermostat. Can someone help!!!
Alex
Alex
Le Mans Master
Joined: Mar 2001
Posts: 7,999
Likes: 14
From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
Cruise-In III Veteran
Cruise-In IV Veteran
St. Jude Donor '12
A C4 is a vaccum cleaner. Sounds like your radiator fins are blocked.
PSA: Rmove your Shroud over the radiator and A/C condenser at least every two years and clean the trash and debris from between them.
PSA: Rmove your Shroud over the radiator and A/C condenser at least every two years and clean the trash and debris from between them.
Drifting
Joined: Sep 2003
Posts: 1,363
Likes: 7
From: 1994 LT1 Coupe 6-speed with FX3 & 2000 LS1 Vert 6-Speed with F45 Hunterdon County, NJ
I have a 1991 corvette coupe with 57,045 miles, when the car reach operating temperature and the primary fans come on it stays and never cut off. It’s these normal or the ECM is malfunctioning. I have changed the coolant TEMP sensor, the fans relays, the Fans coolant sensor and the thermostat. Can someone help!!!
Alex
Alex
then it is likely the fan relay(s) are sticking (contacts get pitted and almost welded together over time and age).
Or it could be the temperature sensor sticking, but much less likely.
The fan relay(s) (at least on the 94s) on the mounted on the radiator housing driver side -- and available at most auto parts stores, via most supporting forum vendors and your local GM dealer.
Thread Starter
Intermediate
Joined: Nov 2008
Posts: 27
Likes: 0
From: El Paso TX
I did change both relays form AutoZone duralast and the coolant temp sensor also; I also remove the radiator shroud and cleaned the radiator. I will try another relays from a different brand and coolant temp. The dealer mechanic told me he couldn't find anything wrong. Does anybody experience this problem before? I some advise.....
