All fans run power is on no cooling? - Coldtech J4SRF-40B Commercial Refrigerator

It might be two stage cooling - leaving one fan to provide adequate cooling for most conditions and the other switching on when the temperature climbs in heavy traffic, very hot weather, towing, etc.

Some manufacturers wishing to cut noise to a minimum fit one large fan and a powerful motor which they run at different speeds depending on how much cooling is required.

it could be the cooling fan relays or possibly the cooling fans. to check the fans disconnect the plug at the fans and run jumper wires to them both power and ground. if they don`t work then the fans are bad. check voltage and grounds at the plugs when they should be running, if they are good then the wiring is good. it could also be the coolant sensor for the fans that send the signal from the sensor to the computer so it knows when to turn on the fans. the fan that runs with the A/C when turned on could be the A/C relay.

Cooling fan is controlled by a relay and a temp sensor. You need to check that each piece is working.
Run power to the fan. fan run? fan ok.
Bridge the relay. Fan run? run power to the relay coil. Fan run? relay good.
find temp sensor. replace.

I didn't know it had a light on the dash that said "cooling fan temp".
My 93 doesn't.
The cooling fans are controlled by the computer and turned on when the ac is running or when the engine reaches 220 degrees.
A mechanic would check the fuse and relay for power and the fan motor for power and ground.

COOLING FANS NOT RUNNING

It is normal for the A/C air to warm up a little when stopped. Less airflow thru the condensor. It is normal for the engine temperature gage to rise up to about the 80% mark on its scale before the cooling fan kicks on. The gage will also show about the same reading on the first start of the day, until the thermostat opens.

If the fan(s) are not working properly the A/C air and engine temperature will rise. If you have a belt driven clutch fan, the clutch may be worn out. All cooling fans kinda sound like miniature jet engines when its hot out, more so when the A/C is on. Replacing the clutch is all you can do for a belt driven fan. Electric fans are more complicated....
Check all main power electrical connections first.... Electric Fan(s) not working, Checking the fan(s), relay, fuse and engine temperature sensor's.
Verify that the fans work by unplugging them and run jumper wires to the fan(s) from the battery. If they run, your problem lies elsewhere. If either does not run, it's the motor.
Next thing to check is for power at the fan connectors. You have to be cautious doing this because the engine needs to be running and warm if not almost hot, and the A/C also needs to be on. (Both must be on and running for the duration of this checklist.) The A/C fan is on the passenger side and should come on almost the instant the A/C is turned on. It is also the secondary engine cooling fan and should cycle on and off in relation to engine temperature. Use a test light to probe the two wires on each fan. If you find power the fan motor(s) is/are probably bad. If there is no power to fans, roll up your sleeves!

The temperature switch is usually located above the oil filter. If the dash gage is working, its probably OK. Next is the Fan Control Temperature Sensor, located IN or CLOSE to the thermostat housing. You will find out if it is working later is this checklist. I just wanted you to know where it is. Next is the relays and fuse's. Usually located in the engine compartment on the passenger side power distribution box. You will need to remove anything over the cover to open it. If the fuses are OK, tap on the relays or pull them out and push back in. If the fans are still not running, pull a relay and probe the socket terminals for power. Two or three of the terminals should have power, usually criss-cross from each other. Two are hot battery power, and the third is the "signal" voltage which triggers the relay to send 12V battery power to the fan. This signal voltage comes from the sensor at the thermostat. If only two terminal's have power, then I would replace the thermostat sensor if not both sensors.

Hope this is clear as mud! and helps! Please let me know what you find.

Which of the fan? Is it Power fan or processor cooling fan?
POWER FAN: check if the casing of the power pack is touching the fan or wire if not then prepare to change power pack or the fan.

Processor Cooling Fan: If there is no wire in the system touching the fan then know that the ball bearings are getting bad. Then plan for replacement.

check the temperature switch for power and test power at fan relay, you can also run wire from battery to fan directly and tap to see if fan works

you need do some thing follow:
1) clean the cpu fan and sink(around there dirdy)
2) check the cpu fan is running and stop ok when power on if running go next
3) check the cpu fan, is there any running and stop then see it run again before the laptop freezen?
4) if the fan not running again before freezen that your fan control circuit out of work on the motherboard need to repair
5) if the fan running control ok that the fan can run and stop and run again. you have to add a EXT cooling base under the laptop
hope to help you solve it

Sounds like a power supply problem. There is enough power to run the fan but when you turn it to cool the current draw by the compressor drops the voltage. The lower power light is telling you the answer to your problem.