It does not close the circuit to ground until the coolant reaches about 225 deg. Nothing. The AC system depends upon being able to dissipate heat into the engine coolant. The circuit is working if the fan turns on when you unplug the coolant temperature sensor. A failed sensor can cause the fan to run excessively or not run when cooling is needed. If you find that one radiator within your home stays cold, ensure that the valves located on the sides of the radiator are open. the radiator fan doesn't work unless the AC is on. In the absence of a fan, air still flows in, usually directed by the shroud. If only one radiator is not working, scroll down further for possible solutions. Only do this if you have a sound knowledge in electrics. Figure 3. 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. 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. Thanks Radiator fan testing points. Specifically, the fan that cools the AC condenser should run when "AC" or "defrost" is selected. 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. Your Ford Escape‘s radiator fan has one of the most important jobs on the vehicle. My hot water system works fine no system problems at all. If the valves are open but the radiator is still cold, it’s possible that the valves are blocked. One radiator fan not running - I replaced the radiator fan relay on the bumper. I am a bit worried that the only radiator will not be working either in a minute! They are designed to only run when needed. Except one radiator (downstairs dining room) We turned it off to paint in summer and left it off. Now turned it on and it will not heat up. If the radiator fan is not working, it’s a serious problem. Then both fans work. 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. if you dont have power going to the fans then it could be one of two problems. when the coolant temperature sensor, located on the radiator, opens and FAN relay #1 and FAN … 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. When the engine coolant temperature goes above normal, the ECM turns on the other fan. Naturally I looked to see if the fans were working. '05 Chrysler 300c Hemi '08 Hummer H2 Mar 27, 2011 #3 B. Burnout124 Member. Only one side of laptop fan working Page 2 of 2 First 1 2. The secondary thermo-switch for the cooling fan is located where the upper radiator hose attaches to the engine. Have bled the entire system no air causing problem all other radiators working fine. According to GM, that is how they are supposed to work. N ... Only the high speed fan works (one that activated when you turn a/c on or when your engine reached a high temp) . Thanks. If everything else seems to be fine, the fan clutch is the most likely cause of radiator fan failure. Hi, I would recommend getting the fans replaced as soon as possible. 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. - 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. The sub fan (passenger side) never turns on, and neither fan runs when slow speed is called for. 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). 5. Gradually one by one the radiators have stopped warming up until there is one in the kitchen that is hot. Fan motor failure. 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 don't know much about cars but i decided to change, (Radiator Fan switch as well). Is that normal? Jump to Latest Follow 1 - 6 of 6 Posts. Run jumper wires between the connector's two electrical terminals. It overheats yes & all the fuses are good even the car sensor is good too. Am I right in thinking there is air in the system? Only 1 Cooling Fan Working. Only one radiator not working? There are springs within the fan clutch that can wear out or corrode over the years. Jump to page: winhelper. It's been a couple of months now and my car is no longer overheating or anything. Check that the room thermostat (if present) is switching properly. See Contact Test in Step 1. If the radiator fan is in working condition, move on to the next step. Mechanic's Assistant: What is the model/year of your Kia? Also, it's important to take a look at possibilities of why a 30A fuse blew. I noticed only one fan working now. I haven't got a bleeding radiator bleeder! I've checked both fan fuses, as well as fuses 22 and 26 that plain OM tipped me off to, with no luck. If the fan does not turn on, you will need to replace it. One of the radiator fans not working. I'll give all this a shot on Tuesday, my next day off. Search titles only. Only one radiator fan running. Checked the relays, only found 3 of them, still not working. Posted by sunil noronha on Aug 14, 2018 Want Answer 1 Afterthought: Is the radiator a crossflow or downflow? If it does not, then you may have a fault. This sensor switches the cooling fan off and on as needed. May I know if this is normal or should i be repairing the laptop? The previous person never replied back to say if they had two cooling fans or one. 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. 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? The Toyota's fan only turns on when the coolant reaches a certain temperature, which is measured by a sensor. If this burns out or fails, you’ll need to replace it. Active 4 years, 3 months ago. Checked the fuses, nothing. It is the last line of defense between you and an overheating engine. Joined Just because the radiator fan is not on does not mean that it is not working. Onto my point. the second fan should come on then. 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. F. This is the switch that will keep the cooling fan running after the … By: ... try turning your air conditioning on when the one fan is working. The boiler only comes on for a few minutes then goes off. The fan clutch is the assembly that holds the radiator fan to the engine and makes it turn. 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. The blower motor for the heater is a great one to check. Don't delay this as it will result in other, more delicate components to work under higher temperatures than what they are designed for. I recommend you do the same. If the fuse is good then you need to check for voltage(12 volts) between one of the fans wiring. Posts : 19. window 10 home . Reread the entire conversation to get some ideas of what to look for. Radiator Fan is not working. I've also tried to check if my fans move when i turn on my laptop and still, only one of them runs. 2003 Kia Optima NO RADIATORS WORKING? Thread Starter New 18 Feb 2018 #11. 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. 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. 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. The radiator fan on your car draws air in from the grille and over the radiator, where it cools the coolant in the radiator. Fan Clutch. Have you checked the fuses? 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 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. Should I just replace the assembly? If it's only one fan not turning on, its the fan. Ask Question Asked 4 years, 3 months ago. Viewed 5k times 3. Hi This is puzzling me! 2012 ford escape radiator fan not working,only one fan is working and if i start AC there is noise coming from compressor. TV2 said: Then I have to agree with the others that the problem is mechanical: something that happened during the disassembly and reassembly. 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