Okay. I just replaced the head gasket and did a valve job. Use J 38185to remove the outlet hose clamp from the radiator. The when the heat is on, even on low the radiator fans are on high and EXTREMELY loud. #2 · Oct 25, 2020. Check related components, such as coolant level. but will only come on by itself at 230d f. The plugs you are talking about on the top part of the radiator that clip on to it, those are what feeds the radiator fan power. Check and see if the condenser fan works at all, put a power on it and a ground and see if it. If the cooling fan resistor fails or has any issues, it can cause power to be cut off from. BTW yukiz is referring to the MFI or fuel pump relays. The most common reasons a Ford Escort radiator fan isn't working are the fan assembly, the fan clutch, or the coolant temperature sensor. With the engine off the block and intake stay hot a lot longer because there is no water flow (the water pump is not turning with the engine off). A dirty radiator. 0 ran good til now. Once the temp gets so hot, the ECU commands the radiator fan to come on. Condenser fan isn’t turning on at all. It must be the 2 wire temp sensor or the ECU. . Was wondering what the resistance should be across the fan sensor. Conditions: Air temperature 30 degrees F. 1. Turn the control valve counterclockwise to open it, and make sure it’s open all of the way so the radiator. Run a good ground to the fan and if it speeds up it is the sensor. I thought this was odd due to the air temperature. However, the precise temperature can vary. Fan comes on high about 225 degrees. A faulty thermostat could cause the engine to start overheating if it is not opening at the proper temperature. I was driving it and noticed it started to overheat. This is the one from the key that will be used to actuate the relay. overheating condition (low coolant) Perhaps bad temp sensor would trick it to think fans needs to run on high. . You may want to check those. 200 Million used auto parts instantly searchable. On my 1996 for contour 4 cyl 2. $8. Generally, most radiator fans are turned on automatically at 200 degrees Fahrenheit. if engine at long stand still,the engine temperature will rise about 190 degrees the cooling fan suppose to automaticaly turn on when coolant temperature sensor get hot it cause its resistance decrease causing pcm to send power to coolant fan relays and cooling fans, when you turn on AC the cooling fans suppose to turn on to cool down AC. When i start my 1999 ford escort zx2 the cooling fan comes on right now no. The most common reasons a Ford Escort radiator fan isn't working are the fan assembly, the fan clutch, or the coolant temperature sensor. i dont think the fan is your issue. If not, you have a fan or relay problem. My 2013 F150 with 36k miles now has an excessively loud fan noise. Past 30 Days: 1,573. Usually within a few minutes the radiator fan will kick. Radiator fan will not run unless I jump it. To remedy this problem, it may be necessary to replace the malfunctioning thermostat. The signal from the coolant temperature. A new motor is supplied without a fan, which must be refitted from the old one. reply. Jun 7, 2003. Ultimately, the fan is controlled by the computer. top up coolant if necessary. Posted February 16, 2010. 2). Scan the computer for trouble codes, if necessary. If it’s not functioning properly, it can cause the fan to turn on and off frequently. . Based on your description, the best place to start would be to check that thermostat is functioning properly. In most vehicles, the coolant needs to reach 225 Fahrenheit for the fans. Tobacco Road. If with the A/C on the engine doesn't overheat then it confirms that the low speed on the fan motor is not working. Never, never, never give up. temp sensor for gauge has nothing to do with fan circuit. Engine running hot. If not, the CCRM is BAD. c. The owner doesn’t want to crack the head of the newly-rebuilt engine, so he stops driving. I took the relay out for the #1 fan and jumpered across which makes the fan turn on. You’ll need to locate and test the engine temp sensor. The fan can also fail, and wires in the circuit can break or become loose. 5:29. 1,840 satisfied customers. the radiator fan doesnt come on and engine over Ford. Very correct the ECT is a 2 wire thermistor,when coolant temp increases, the resistance andsignal voltage decrease,If you disconnect the sensor the fan goes on, you just trouble shooted the vehicle cooling fan switch, If anything the signal to the gauge itself may be non-op and not getting to the indicator, try this with vehicle at warm up temperature if you turn the A/C does the fan turn on. I just recently bought a '98 ford escort zx2. I had a few questions. At stops the engine shut off as expected. Straight wiring. 1 with no power out, the CB is bad. Unplug that one-wire sensor, then see what the gauge does. Between 192-210F is passive cooling through the radiator. Also, my radiator fan does not turn on by itself unless I turn the A/C on. Check Your Coolant Level. This problem existed before and after the radiator was replaced. When the car is idling the temperature rises. I have a 302 bored . I replaced the relay and temperature sensor, neither have helped. If you've driven the car any distance and are about to park, the fans normally will be on since you've slowed down and the engine begins to heat up just a bit more. Remove the cooling fan shroud. Typically 185* ON / 175* OFF. The evaporator was replaced and the system recharged. I watch the temperature of the engine increase, looking for it to reach the specification for thermostat opening. Next inject +12 volts to pins 1 or 2 (RD/OG), confirm if the fan RUNS. A fault in the control circuit from the car's computer (depending on vehicle model) A bad temperature gauge. 02 ford e150 fan clutch will not activate/engage when turning on ac or if it gets hot while idleing, ac only blows cold when im on the road at high speeds and ac measures high pressures, have tried ch. The fan was extremely loud. Disconnect the wiring harness. Single switches or relays can fail internally causing a number of different symptoms including no start conditions (inoperative fuel pump or PCM), engine running warm due to inoperative cooling fan, or the AC might not blow cold air. So I tried that and the fan turns on, and cools the engine right. Correct. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. 4. If the motor fails, it won’t power the fan blades to spin. Thus, the temperature gauge will go up and down. 0 sohc 1 owner. Causing high pressures. Hello: You may have a cooling fan (s) problem. 0 %. Test the fan motor. Ccrm (constant control relay module) the 16-24 pin electrical box under air filter was the cause of my radiator fan not working, or my a. Once the electrical connections have been removed, use a wrench or socket to remove the bolts that secure the radiator fan to the engine. Cooling fan continued to run. . Wait until the engine as cooled off and locate and slowly remove the coolant reservoir or radiator cap and check the coolant level. Vocational, Technical or Tra. I was driving it and noticed it started to overheat. 9 years ago. )When the engine temperature rises higher than normal, inspect the cooling fan. The main fan should run regardless of what the A/C status is, as it should be based on coolant temp. Radiator hoses have collapsed. My initial over the phone estimates FROM NON-DEALER Volvo specialists were about $1000. you should have battery voltage at both relays. The radiator fan comes on when the car’s temperature reaches a certain threshold. Was told it may be the computer. Want Answer 0. You can check the thermostat by placing it in boiling water and make sure it is opening up. sensor, terminals, and it still. Disconnect the transaxle oil cooler pipes from the radiator. Fan Problems: Unusual noises are a good indication there is a problem with the fan itself. My radiator fan won't turn on, tried the search function but all that came back was people whose fans wouldnt turn off. Once we pulled it, it went off, but w. A typical engine cooling temperature sensor is a Negative Temperature Coefficient (NTC) thermistor, which means its electrical resistance decreases when the temperature increases. Simply unplug both the wires, negative as well as positive. Leave the hood open or listen carefully to see if the fan is turning on correctly. Insert the sensor into place. Fan resistor. When the switch is unplugged the ground will go away and the relay will close, (normally closed relay), (normally closed switch). If the engine overheats, it can suffer from catastrophic and costly damage. Those radiator fans will turn on automatically when the AC is on whether they are needed or not. Use the electronic odometer test mode trick. 06 escape cooling fans dont come on with ac swaped relays didnt change ac pressure is normal until it warms up. 1994 Ford Escort 1. 2001 Ford Escort 137,000 mi, Visitor. I added the Ford numbers as well. Turn on the A/C and both the driver's side and passenger's side fans turn on. Blow Fuse. This being said it works on the principal as # 1 said, The coolant has to warm to a point that the switch can open to be. 675 posts · Joined 2011. If possible, select a new sensor that is the exact same size, shape, and brand as the new one. RECENTLY PURCHASED CAR - cooling fan was not working , I disconnected wire from sensor in block to keep fan running all the time to avoid overheating. 3,189 satisfied customers. You left the AC on. checked the fan fuses, both intact. Check to see if the non working fan is getting any voltage. Posted on Aug 05, 2011. I have replaced the fan, both relays and the fuse. The strange part was that when the problem happened the coolant temp gauge on the dash would drop to dead cold. It is between -5 & 0*c in my area now now so I haven't. The most common causes of why a radiator fan is not working are a blown fuse, a bad relay, or a broken wire. If you feel the upper hose very hot and the lower hose cooler than normal, it may be a stuck. step 5 :Removing the Coolant Temperature Sensor. This is the bit that screws into the cooling system and plugs into the fan loom where you manually switch it on. (Pin 7 of the PCM) obtained from the ECT , to turn the Engine Cooling Fan on if needed. Continuity disappears on the yellow wire from the relay to fan with the key "on". (high speed). Low coolant levels can also indicate that there is a leak in a hose, a water pump, or some other. 9 radiator fan does't come on at all. On Escort, when coolant temperature reaches 221°F (105°C) or. A dirty radiator. EasyOBD is showing coolant temperature to be 20 to 76 degrees. A couple of days ago I replaced the engine coolant temperature sensor on a 2002 Ford Escort ZX2 after the service engine light came on and everything seemed fine at first. 0L, the radiator fan only worked with the air conditioning turned on (as in no low speed - engine would overheat while idling or in traffic, but was fine as long as the A/C was on). Leakage In The Coolant. I replaced the relay and temperature sensor, neither have helped. Release the button, and you're in test mode. I resolved this problem about 2. Start troubleshooting by inspecting the radiator’s exterior. Low Charge. ) Coolant level and condition are good. Make sure the a/c is off and see what happens. 9 engine. And the fan provides constant airflow through the condenser even when the vehicle is stationary. radiator fan comes on when I turn on ac but will. 0. The cooling fan motors work together with the cooling fan blades to pull air through the radiator. If your cooling fan circuit fuse has blown, this is another sign of a problem with the radiator fan motors. there is probly a fan sensor mounted on the block,and a lead that will go to the brain box or relay,if you have relay. As some point along her 20 mile trip the radiator cooling fan came on. No codes or vacuum leak. Unplug the connector. To understand how the cooling fan should work. There's a number of reasons your cooling fan is not c. To test that you need a 2 wire jumper from the battery to the fan motor. I have a 1997 ford escort 2. If the sensor stops working, the fan may not come on or it may run constantly. Even with the AC off, the cooling fans should cycle on and off when the coolant temperature reaches around 205-210 degrees F.