cooling fans

With in seconds of starting my 98 coupe the cooling fans come on even without the ac on and the car has not even reached operating temp.
Thanks for any help. DLW

[Speedratchet]

I would check to see if you have any trouble codes stored and then check your fan(s) operation with the following temp information. You might just have a bad sensor or relay.

Low Speed Cooling Fans

The low speed cooling fans are controlled by the PCM based on the following inputs:
- The A/C system
- The Engine Coolant Temperature (ECT) sensor
- The Vehicle Speed Sensor (VSS).

The PCM will turn the low speed cooling fans ON when any of the following conditions exist at idle:
- Certain PCM Diagnostic Trouble Codes (DTCs) are set.
- ECT above 104°C (219°F) will enable low speed fans.
- A/C head pressure above 219 psi.

Once the low speed fans are turned ON by Engine Coolant Temperature, the PCM will turn the fans OFF when that temperature has dropped about 6°C (11°F). If the low speed cooling fans are turned ON by high A/C head pressure, the PCM will turn the fans OFF when the pressure has dropped to 150 psi. The minimum ON time for the low speed cooling fans is 50 seconds.
When engine speed is above 3500 RPM for 12 seconds and the engine oil temperature is above 127°C (261°F), the low speed cooling fans will be turned ON.

High Speed Cooling Fans

The High Speed Cooling Fans are controlled by the PCM based on the following inputs:
- The A/C system
- The Engine Coolant Temperature (ECT) sensor
- The Vehicle Speed Sensor (VSS).

The PCM will enable high speed cooling for both fans when any of the following conditions exist
- Certain PCM Diagnostic Trouble Codes (DTCs) set.
- ECT above 109°C (228°F).
- A/C head pressure above 225 psi.

Once the high speed cooling fans are turned ON by the Engine coolant temperature, the PCM will turn the fans OFF when that temperature has dropped about 6°C (11°F). If the high speed cooling fans are turned ON by high A/C head pressure, the PCM will turn the tans OFF when the pressure has dropped to 180 psi. The minimum ON time for the high speed cooling fans is 26 seconds.

[c4c5specialist]

HI there,
You could also have a bad pressure switch in the AC refrigerant system.
Allthebest, c4c5

[froggy47]

If this car is new to you, a previous owner may have programmed them to come on at low temps.

Thanks for everyones help as soon as I get more time I will let you know how it is working .
The car sets no codes and I have had this thing 8 years and this just started . Thanks DLW