I've also swapped the sub fan relay with the AC relay, and that had no effect (when temp hit 212 F, only the main fan came on, as before). When the engine coolant temperature goes above normal, the ECM turns on the other fan. Happened to mine couple years ago. Below are the possible mechanical checks you should perform to eliminate or find any problems: Is the boiler alight? I just replaced the radiator, thermostat, and water pump along with all hoses and serp belt now the drivers side cooling fan wont turn on causing the car to get real hot while sitting still and idling. If the fuse is good then you need to check for voltage(12 volts) between one of the fans wiring. My hot water system works fine no system problems at all. the second fan should come on then. The fan clutch is the assembly that holds the radiator fan to the engine and makes it turn. See Contact Test in Step 1. The circuit is working if the fan turns on when you unplug the coolant temperature sensor. The previous person never replied back to say if they had two cooling fans or one. Jump to page: winhelper. Only one radiator not working? Posted by sunil noronha on Aug 14, 2018 Want Answer 1 It overheats yes & all the fuses are good even the car sensor is good too. Then both fans work. Is that normal? One radiator not working. If everything else seems to be fine, the fan clutch is the most likely cause of radiator fan failure. If the radiator fan is in working condition, move on to the next step. Ask Question Asked 4 years, 3 months ago. Also, it's important to take a look at possibilities of why a 30A fuse blew. I recommend you do the same. They are designed to only run when needed. I've checked both fan fuses, as well as fuses 22 and 26 that plain OM tipped me off to, with no luck. The AC system depends upon being able to dissipate heat into the engine coolant. Radiator fan not working but the other one work Radiator fan on the driver side dont work but the one on the passanger side does ,do both fans suspose towork at the same time or do thy work seprate what are my problems or sulutions. Have you checked the fuses? Yes, a broken radiator fan can cause the air conditiong to stop working. I noticed today that my cars temp gauge started climbing at every stop, and would drop back down at a fast idle or when I started moving. Radiator fan testing points. Specifically, the fan that cools the AC condenser should run when "AC" or "defrost" is selected. A failed sensor can cause the fan to run excessively or not run when cooling is needed. The radiator fan on your car draws air in from the grille and over the radiator, where it cools the coolant in the radiator. Joined Have bled the entire system no air causing problem all other radiators working fine. The boiler only comes on for a few minutes then goes off. It's been a couple of months now and my car is no longer overheating or anything. when the coolant temperature sensor, located on the radiator, opens and FAN relay #1 and FAN … If the fan does not turn on, you will need to replace it. the radiator fan doesn't work unless the AC is on. - posted in Problems: My mk1 never shows any signs of overheating but Ive always noticed that when coming home from a drive only 1 cooling fan will be spinning. I noticed only one fan working now. This sensor switches the cooling fan off and on as needed. There are springs within the fan clutch that can wear out or corrode over the years. Radiator Fan is not working. Should I just replace the assembly? Posts : 19. window 10 home . May I know if this is normal or should i be repairing the laptop? When the switch is unplugged the ground will go away and the relay will close, (normally closed relay), (normally closed switch). One radiator fan not running - I replaced the radiator fan relay on the bumper. Reread the entire conversation to get some ideas of what to look for. 2012 ford escape radiator fan not working,only one fan is working and if i start AC there is noise coming from compressor. Now turned it on and it will not heat up. Naturally I looked to see if the fans were working. It does not close the circuit to ground until the coolant reaches about 225 deg. Search titles only. The first problem on my ZETEC 2.0 is it always would have the highest speed fan come on when I turn on the AC but no low speed fan in car will run a temperature now that I've changed the pigtails and resistor the low speed fan comes on only when the AC is on but no highest speed fan and still no fan at all when the car's AC is not on any help with this problem with you really appreciated guys Checked the relays, only found 3 of them, still not working. If this burns out or fails, you’ll need to replace it. Unable to locate the temp sensor located on the block, Just in case you're seeing one fan on with the AC. I don't know much about cars but i decided to change, (Radiator Fan switch as well). According to GM, that is how they are supposed to work. Does the second one engage if the engine heats up more and I just never see it working as the car never gets hot enough? If it's only one fan not turning on, its the fan. Except one radiator (downstairs dining room) We turned it off to paint in summer and left it off. Only 1 Cooling Fan Working. OK the radiator fan switch will ground the relay in the J/B 2 on the left side of the engine comp, which also goes through the A/C high pressure switch causing the relay to hold contact open. Mar 27, 2011 #3 B. Burnout124 Member. Hi This is puzzling me! Only one radiator fan running. Hi, I would recommend getting the fans replaced as soon as possible. Unplug the radiator fan connector. You really need to have the fan replaced, or at least, have a diagnostic check to see what is causing the fan to stop working. The reason it's important is that one blown fuse (in either position) shouldn't prevent high speed from working on the radiator fan AND low speed from working on both fans. Afterthought: Is the radiator a crossflow or downflow? Today while adding coolant to my car, I noticed that once the car reached running temperature only the fan on the passenger side had turned on. Thread Starter New 18 Feb 2018 #11. Just because the radiator fan is not on does not mean that it is not working. The sub fan (passenger side) never turns on, and neither fan runs when slow speed is called for. I haven't got a bleeding radiator bleeder! If the valves are open but the radiator is still cold, it’s possible that the valves are blocked. 5. If you find that one radiator within your home stays cold, ensure that the valves located on the sides of the radiator are open. 2003 Kia Optima If the radiator fan is not working, it’s a serious problem. I was only able to find one relay, in the fuse box, looking from the driver fender it is the right side 3 from the top, the bottom right being the blower motor for the heater. Mechanic's Assistant: Has the car been overheating? F. This is the switch that will keep the cooling fan running after the … Thanks. Only one side of laptop fan working Page 2 of 2 First 1 2. N ... Only the high speed fan works (one that activated when you turn a/c on or when your engine reached a high temp) . One of my car radiator fan doesn't work only one works but when I turn on the ac they both work, what's my problem? You will need to check everything carefully. Thanks If it does not, then you may have a fault. Only do this if you have a sound knowledge in electrics. I am a bit worried that the only radiator will not be working either in a minute! Gradually one by one the radiators have stopped warming up until there is one in the kitchen that is hot. Nothing. Fan Clutch. But the rate of air flow and the air temperature now depend on what speed the vehicle is traveling. I'll give all this a shot on Tuesday, my next day off. Don't delay this as it will result in other, more delicate components to work under higher temperatures than what they are designed for. if you dont have power going to the fans then it could be one of two problems. I believe (not certain) that with the crossflow radiators, only one fan will come on if the engine coolant temperature is low but the AC is on. Jump to Latest Follow 1 - 6 of 6 Posts. By: ... try turning your air conditioning on when the one fan is working. If only one radiator is not working, scroll down further for possible solutions. Onto my point. The secondary thermo-switch for the cooling fan is located where the upper radiator hose attaches to the engine. Check that the room thermostat (if present) is switching properly. Viewed 5k times 3. '05 Chrysler 300c Hemi '08 Hummer H2 Figure 3. NO RADIATORS WORKING? TV2 said: Then I have to agree with the others that the problem is mechanical: something that happened during the disassembly and reassembly. The Toyota's fan only turns on when the coolant reaches a certain temperature, which is measured by a sensor. The blower motor for the heater is a great one to check. One of the radiator fans not working. The temp gauge works fine, and the passengers side fan ( the one that turns on with the a/c ) works but only when the a/c is running. Checked the fuses, nothing. Mechanic's Assistant: What is the model/year of your Kia? Am I right in thinking there is air in the system? Your Ford Escape‘s radiator fan has one of the most important jobs on the vehicle. It may sound like a funny question, but some of the cars I have use one fan for when the water gets hot, and another fan for when AC is on. It is the last line of defense between you and an overheating engine. I've also tried to check if my fans move when i turn on my laptop and still, only one of them runs. Fan motor failure. Although radiator fan motors are usually reliable and often outlast last the vehicles they are fitted to, they can nevertheless fail for any number of reasons. I am currently using a Acer vx15 and it has a dual fans cooling system but however, i noticed that only one of the fans run. Active 4 years, 3 months ago. In the absence of a fan, air still flows in, usually directed by the shroud. Run jumper wires between the connector's two electrical terminals. 2 of 2 First 1 2 not heat up usually directed by the shroud my car is no overheating. Check if my fans move when i turn on, you will need to replace it flows... 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