Question about Cooling System for Chevrolet SSR

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My cooling fan does not start. What controls the fan, and how do I isolate the problem

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If it's not the fuse, the fan thermostat may have gone bad. This is a separate thermostat from the radiator coolant system thermostat even though it contacts the coolant. See if there is an accumulation of minerals on the coolant side of the thermostat. Cleaning it off may help. Depending on the setup, the voltage or resistance of the thermostat changes significantly at the specified temperature.

Posted on Jun 29, 2015

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Blower motor may need a fuse ,,check your fuse panel

Posted on Oct 18, 2013

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When i start my 2008 Cadillac sts i get a notification that engine hot A./C off. Even though it is the first time i stated it today


ENGINE HOT - AC OFF
Cooling System Description and Operation

you must have a cooling system problem of some sort !

Do the cooling fans come on when A/C is switched on ? Fan's should come on ! Does your vehicle have two or three cooling fan's ?
Cooling Fan Control - Two Fan System
The engine cooling fan system consists of 2 puller type electrical cooling fans and 3 fan relays. The relays are arranged in a series parallel (S/P) configuration that allows the engine control module (ECM) to operate both fans together at low or high speeds. The cooling fans and fan relays receive battery positive voltage from the underhood fuse block. The ground path is provided at G104.
During low speed operation, the ECM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. This energizes the low speed fan relay coil, closes the relay contacts, and supplies battery positive voltage from the low fan fuse through the cooling fan motor supply voltage circuit to the left cooling fan. The ground path for the left cooling fan is through the cooling fan S/P relay and the right cooling fan. The result is a series circuit with both fans running at low speed.
During high speed operation the ECM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. After a 3 second delay, the ECM supplies a ground path for the high speed fan relay and the cooling fan S/P relay through the high speed cooling fan relay control circuit. This energizes the cooling fan S/P relay coil, closes the relay contacts, and provides a ground path for the left cooling fan. At the same time, the high speed fan relay coil is energized closing the relay contacts, and provides battery positive voltage from the high fan fuse on the cooling fan motor supply voltage circuit, to the right cooling fan. During high speed fan operation, both engine cooling fans have their own ground path. The result is a parallel circuit with both fans running at high speed.
The ECM commands the low speed cooling fans ON under the following conditions:
• Engine coolant temperature exceeds approximately 94.5°C (202°F).
• A/C refrigerant pressure exceeds 1447 kPa (210 psi).
• After the vehicle is shut OFF, if the engine coolant temperature at key-off is greater than 101°C (214°F), the low speed fans will run for a minimum of 60 seconds. After 60 seconds, if the coolant temperature drops below 101°C (214°F), the fans will shut OFF. The fans will automatically shut OFF after 3 minutes, regardless of coolant temperature.
The ECM commands the high speed fans ON under the following conditions:
• Engine coolant temperature exceeds approximately 104.25°C (220°F).
• A/C refrigerant pressure exceeds approximately 1824 kPa (265 psi).
• When certain DTCs set
At idle and very low vehicle speeds the cooling fans are only allowed to increase in speed, if required. This ensures idle stability by preventing the fans from cycling between high and low speed.
Cooling

Having a qualified professional technician check it out would be your best bet ! Hooking up a factory or professional type scanner an check data input's an DTC'S - diagnostic trouble codes .

Diagnostic Starting Point - Engine Cooling
Begin the system diagnosis with the diagnostic system check. Refer to Diagnostic System Check - Vehicle . The Diagnostic System Check - Vehicle will provide the following information:
• The identification of the control modules which command the system
• The ability of the control modules to communicate through the serial data circuits
• The identification of any stored DTCs and their status
The use of the Diagnostic System Check - Vehicle will identify the correct procedure for diagnosing the system and where the procedure is located.

DTC P0480: Cooling Fan Relay 1 Control Circuit
DTC P0481: Cooling Fan Relay 2 Control Circuit
DTC P0480: Cooling Fan Relay 1 Control Circuit
DTC P0481: Cooling Fan Relay 2 Control Circuit
DTC P0691: Cooling Fan Relay 1 Control Circuit Low Voltage
DTC P0692: Cooling Fan Relay 1 Control Circuit High Voltage
DTC P0693: Cooling Fan Relay 2 Control Circuit Low Voltage
DTC P0694: Cooling Fan Relay 2 Control Circuit High Voltage
DTC P1258: Engine Coolant Overtemperature - Protection Mode Active
DTC P2600: Auxiliary Coolant Pump Relay Control Circuit
DTC P2601: Auxiliary Coolant Pump Performance
DTC P2602: Auxiliary Coolant Pump Relay Control Circuit Low Voltage
DTC P2603: Auxiliary Coolant Pump Relay Control Circuit High Voltage

Dec 10, 2017 | Cadillac Cars & Trucks

1 Answer

I CAN 'T GET THE COOLING FAN TO WORK BY IT'S SELF


The fan can be driven by a drive belt off of the crankshaft or it can be operated electrically. Regardless of the design used, inspect the fan blades for stress and cracks.
Electric fans are also inspected for damage and looseness. If the fan fails to turn on at the proper temperature, the problem could be the temperature sensor, the fan motor, the fan control relay, the circuit wires, or the controller. To isolate the cause of the malfunction, attempt to operate the fan by bypassing the control. On a computer-controlled system, this can be done by using a scan tool to activate the fan. If the fan operates, the problem is probably in the coolant temperature sensor.
It is also possible to check fan function by jumping the fan relay to attempt operating the fan motor. If the fan operates, the relay may be the faulty component; however, additional tests will have to be performed on the control circuit of the relay.
A jumper wire can also be used to jump battery voltage directly to the cooling fan. If the fan motor fails to operate, check for proper ground connections before faulting the motor.
To direct air flow more efficiently, many manufacturers use a shroud. Proper location of the fan within the shroud should be at lease 50 percent inside the shroud. If the fan is outside the shroud, the engine may experience overheating due to hot under-hood air being drawn by the fan instead of the cooler air. If the shroud is broken, it should be repaired or replaced. Do not drive the vehicle without the shroud installed

May 08, 2012 | 1996 Pontiac Sunfire

2 Answers

Chrysler lhs overheating. fans dont run, fuse is good


odds are your fan relay is out. I take your model has two fans with seperate eletric motors.

Nov 03, 2011 | 1997 Chrysler LHS

1 Answer

Hi, I have a goldStar GA 1866VHR split Airconditioner, (5050w cooling and 5040w heating capacity). Today I noticed that compressor/condenser unit was still running after I turned off the aircond: from the...


Thanks for your detailed information. But solution is very simple. The compressor contactor in out door unit. Struck. And hence, when you power on, without indoor commanding, the out door starts running.

Replace same type Contactor relay (In out door unit) immediately. Hope, it's helpful.

Jan 19, 2011 | Heating & Cooling

1 Answer

AC won't start. Fan runs


Depending on make & model, usually if you hear a "click" at control box at ceiling when switched to cool, that's a good indication of a faulty relay, capacitor , or maybe even compressor. Not something to play with if not experienced, especially capacitor. Have someone who knows electrical troubleshooting check voltages at compressor and you should be able to back-track from there and isolate problem. If no clicking at ceiling when asking for cool, check thermostat, then control box connections etc at ceiling. Need more info such as make and model number as well as thermostat type if more questions please.

Apr 27, 2010 | Dometic Rooftop RV Air Conditioner

2 Answers

Radiator fan cycles continously. Fan radomely comes on and off frequently and has consistently gotten worse. Because of intermittent problem, Mazda was unable to diagnose problem. Any advice would be...


First, intermittent problems are the worst! I would look for a bad or loose connection. Does the fan ever run consistently? If you turn on A/C most cars will run fans continuously, if yours works ok on this setting then problem is isolated to temp control (fans ok, wiring ok, relay ok) The temp switch would be probably be faulty (or connections). If your fans cycle even on A/C setting then you are looking at a complete electrical inspection. Switches, wiring, fuses, connections, relays, fans...everything! Hope this helps and good luck!

Mar 17, 2010 | 2006 Mazda MPV

2 Answers

1992 Ford Taurus with a 3.8l V6 the cooling fan


The Taurus has Two temp sensors. One for the dash, which is isolated, then one for the PCM, it also controls when the fan relay should actuate. Its a 2 wire sensor, just above the thermostat. If you remove the harness from that sensor, and the cooling fan comes on, at any temp, (should take 5- 10 seconds) then thats your fault.

Sep 16, 2009 | 1992 Ford Taurus

1 Answer

Cooling fan does not come on at all...


Hi ,I posted this problem as well (ROYP75) I fixed the problem by replacing the printed circuit board(this amongst other things controls the fan speed).If you can remove and replace self tapping screws and replace wires like for like on the circuit board you can do this.Isolate from gas and electric, remove oven back taking care with fan wires, wires connected to circuit board and fan connected to oven back once removed you will see circuit board and from their it's just a case of swapping parts .circuit board was purchased from espares .co.uk part no es660722 hope you find this helpful

Oct 06, 2008 | New World G60m Gas Single Oven

1 Answer

Power running through neutral wire


If you are getting power on the neutral that usually means the neutral is open (broke). To confirm this check the voltage on your 2 hot leads. You may need to check the voltage when the oven is on. You may find high voltage on one leg and low voltage on the other. The high voltage would fry a fan (so would low voltage for that matter). I hope this helps. Sorry I don't know more.

Jan 30, 2008 | Ovens

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