How to diagnose and fix an overheating engine with a non-functioning cooling fan?

If the engine is overheating and the cooling fan is not coming on when the engine temperature rises, there are several steps to diagnose and potentially fix the issue. First, unplug the fan motor electrical connector and connect the motor directly to the battery with fused jumper wires. If the fan motor does not come on, it will need to be replaced. If the motor is okay, the problem may lie with one of the fan relays. There are three cooling fan relays that can be checked and replaced if necessary. If the relays are not the issue, the wiring and connections to the fan motor should be inspected. If no problems are found, the engine coolant temperature sensor or the Powertrain Control Module (PCM) may be the cause and should be diagnosed with proper equipment. To replace the cooling fan, the negative terminal of the battery should be disconnected and the vehicle securely supported. The lower splash pan, radiator support cover, air filter housing, and torque strut (if equipped) should be removed. The coolant should be drained and the upper radiator hose and upper transaxle oil cooler line should be disconnected. If there is an oil cooler, the retaining bolt should be removed and the oil cooler lines disconnected. The fan electrical connectors and wiring harness should be disconnected, and the fan(s) lower mounting bolts should be removed. The fan(s) can then be unbolted from the radiator and carefully lifted out of the engine compartment. To detach the fan from the motor, the motor shaft nut should be removed, and to detach the fan motor from the shroud, the mounting bolts should be removed. Installation is the reverse of removal, and the cooling system should be refilled, the engine run, and checked for leaks and proper operation.

Genuine Cadillac Deville Radiator fan

Radiator Cooling Fan

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Cadillac Deville Fan Kit,Engine Coolant
Part Number: 22125855
$54.31 MSRP: $78.84
You Save: $24.53 (32%)
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Product Specifications
- Other Name: FAN KIT, Engine Air Cooling(Electrical); Fan, Fan Assembly, Fan Blade
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1999 Cadillac Deville | 4 DOOR, DEVILLE | 8 Cyl 4.6L
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Cadillac Deville Fan Kit,Engine Coolant
Part Number: 22136390
$28.23 MSRP: $51.36
You Save: $23.13 (46%)
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Product Specifications
- Other Name: FAN KIT, Engine Air Cooling(Electrical); Fan, Fan Blade
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 Cadillac Deville | 4 DOOR | 8 Cyl 4.9L
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Cadillac Deville Fan Asm,Engine Coolant
Part Number: 12487695
Product Specifications
- Other Name: FAN, Engine Air Cooling(Electrical)
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2005 Cadillac Deville | DEVILLE | 8 Cyl 4.6L
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Cadillac Deville Fan Kit,Engine Coolant
Part Number: 22126185
Product Specifications
- Other Name: FAN KIT, Engine Air Cooling(Electrical); Fan, Fan Blade
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1999 Cadillac Deville | 4 DOOR, DEVILLE | 8 Cyl 4.6L, 8 Cyl 4.9L
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Cadillac Deville Fan Kit,Engine Electric Coolant
Part Number: 22098794
Product Specifications
- Other Name: FAN KIT, Engine Air Cooling(Electrical); Fan, Fan Assembly, Fan Blade
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993 Cadillac Deville | 2 DOOR, 4 DOOR, 60 SPECIAL 4 DOOR, CONVERSION, TOURING 4 DOOR | 8 Cyl 4.9L
- 1985-1990 Cadillac Deville | 2 DOOR, 4 DOOR, 60 SPECIAL 4 DOOR, BROUGHAM 2 DOOR FWD, BROUGHAM 4 DOOR FWD, CONVERSION, FUNERAL COACH, LIMOUSINE 4 DOOR, LIMOUSINE 4 DOOR CTR PART | 6 Cyl 4.3L Diesel, 8 Cyl 4.1L, 8 Cyl 4.5L
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Cadillac Deville Fan Kit,Electric Cooling
Part Number: 22098793
Product Specifications
- Other Name: FAN KIT, Engine Air Cooling(Electrical)
- Replaces: 22036292
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1993 Cadillac Deville | 2 DOOR, 4 DOOR, 60 SPECIAL 4 DOOR, BROUGHAM 2 DOOR FWD, BROUGHAM 4 DOOR FWD, CONVERSION, FUNERAL COACH, LIMOUSINE 4 DOOR, LIMOUSINE 4 DOOR CTR PART, TOURING 4 DOOR | 6 Cyl 4.3L Diesel, 8 Cyl 4.1L, 8 Cyl 4.5L, 8 Cyl 4.9L
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Cadillac Deville Motor Asm,Engine Coolant Fan
Part Number: 88890701
Product Specifications
- Other Name: MOTOR KIT, Engine Air Cooling(Electrical); Fan & Motor, Fan Motor, Motor
- Replaces: 22088783, 22137319, 22088785
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1999 Cadillac Deville | 4 DOOR, DEVILLE | 8 Cyl 4.6L
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Cadillac Deville Fan Kit,Engine Electric Coolant
Part Number: 12463003
Product Specifications
- Other Name: FAN KIT, Engine Air Cooling(Electrical); Fan & Motor, Fan Assembly, Fan Blade, Fan Motor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1998-2005 Cadillac Deville | DEVILLE, HIGH LUXURY, SEVILLE, SLS, STS, TOURING 4 DOOR, TOURING SEDAN | 8 Cyl 4.6L
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Cadillac Deville Blade Assembly, Fan
Part Number: 15699836
Product Specifications
- Other Name: FAN, Engine Cooling; Blade, Fan, Fan Blade
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982 Cadillac Deville | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 4 DOOR | 6 Cyl 4.1L
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Cadillac Deville Blade Assembly, Engine Cooling Fan
Part Number: 3636687
Product Specifications
- Other Name: FAN, Engine Cooling; Blade, Fan, Fan Blade
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1984 Cadillac Deville | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 4 DOOR, FORMAL LIMOUSINE, LIMOUSINE | 8 Cyl 5.7L Diesel
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Cadillac Deville Fan Kit,Engine Electric Coolant
Part Number: 12463002
Product Specifications
- Other Name: FAN KIT, Engine Air Cooling(Electrical); Fan & Motor, Fan Assembly, Fan Blade, Fan Motor
- Replaces: 12365380
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1998-2005 Cadillac Deville | DEVILLE, HIGH LUXURY, SEVILLE, SLS, STS, TOURING 4 DOOR, TOURING SEDAN | 8 Cyl 4.6L

Cadillac Deville Radiator fan

The Radiator Fan in Cadillac DeVille vehicles plays an imperative roles as it is responsible for controlling engine heat, especially when the car is idle or moving at slow speed, the air filter or grille rarely provide enough air to cool the radiator. It can be mechanical or electric; the modern production of DeVille has switched to the use of an electric fan, which is powered by a 12-volt motor. These electric fans operate dependant on the coolant temperature, and with the air conditioning system, for proper cooling. Mechanical fans which were common in the initial models of DeVille are attached mechanically to the water pump shaft and thus operates via a thermal coupling that assists in removal of heat while emitting minimal noise and consuming more fuel where necessary. Each of the fans is usually integrated in a shroud assembly that facilitates airflow over the radiator further boosting the cooling. Altogether, the Cadillac DeVille's Radiator Fan is of great importance when it comes to controlling the temperatures of coolants to enhance the performance of the engine.

Each OEM Cadillac Deville Radiator fan we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

Cadillac Deville Radiator fan Parts Questions & Experts Answers

Fan Kit,Engine Coolant
22125855
Q: How to diagnose and fix an overheating engine with a non-functioning cooling fan?
A: If the engine is overheating and the cooling fan is not coming on when the engine temperature rises, there are several steps to diagnose and potentially fix the issue. First, unplug the fan motor electrical connector and connect the motor directly to the battery with fused jumper wires. If the fan motor does not come on, it will need to be replaced. If the motor is okay, the problem may lie with one of the fan relays. There are three cooling fan relays that can be checked and replaced if necessary. If the relays are not the issue, the wiring and connections to the fan motor should be inspected. If no problems are found, the engine coolant temperature sensor or the Powertrain Control Module (PCM) may be the cause and should be diagnosed with proper equipment. To replace the cooling fan, the negative terminal of the battery should be disconnected and the vehicle securely supported. The lower splash pan, Radiator support cover, air filter housing, and torque strut (if equipped) should be removed. The coolant should be drained and the upper radiator hose and upper transaxle oil cooler line should be disconnected. If there is an oil cooler, the retaining bolt should be removed and the oil cooler lines disconnected. The fan electrical connectors and wiring harness should be disconnected, and the fan(s) lower mounting bolts should be removed. The fan(s) can then be unbolted from the radiator and carefully lifted out of the engine compartment. To detach the fan from the motor, the motor shaft nut should be removed, and to detach the fan motor from the shroud, the mounting bolts should be removed. Installation is the reverse of removal, and the cooling system should be refilled, the engine run, and checked for leaks and proper operation.