Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. The cooling fan relay is the relay that controls the engine's cooling fans. When the correct parameters are met, a temperature switch or ...5 posts · Joined 2006. #1 · Oct 15, 2006. I have a '91 Sedan Deville. The AC/Heater blower fan will not turn off. I currently have the maxi fuse pulled. Prior to pulling the fuse I tried to tap on the relays on firewall under 2 fuse housings, but did not get lucky with that.It is possible that two differnet fans are being discussed here. There is a cooling fan for the radiator and another one for the power steering pump. It is true that if the computer in the steering pump goes bad, it can turn on the cooling fan. The radiator fan is not controlled the same, the ECU turns it on with inputs from the fan switch in ...For the first time since I bought my A4 in November 2016, the cooling fan ran on high speed for about 5 minutes after I turned off the car today. I have never heard it running before today. I believe it had been running on high speed for some time, since I heard some unusual noise while driving. It was about 70 degrees here today, so I doubt it ...Won't send 24v to contactor in heat mode, only cooling mode. Full troubleshooting steps with pictures comments. r/hvacadvice. r/hvacadvice. ... Need help! I have this ac/heating system where the fan does not turn off since it’s been set on auto. Called the Bonney company and they want to charge $100 to send a technician.Had a similar problem with my 2021 AT4. Fan stayed on with the car off and almost drained the battery in a few minutes while I was trying to figure out what was happening. Had to disconnect the power to the fan, temp gauge was bellow cold. Heater hose was hot. Pulled code P0128, turned out to be the thermostat. J.Days of Our Lives, often abbreviated as DOOL, is a beloved American soap opera that has captivated audiences for over five decades. With its dramatic twists and turns, complex char...A feature in the computer called "afterblow" may have been enabled. It watches the car as it is being driven for things like AC operation, outside temp, etc. Then, after the key is off for about 5-10 minutes, it'll run the HVAC fan for a few minutes. This helps dry the heat exchanger so it doesn't grow as much mold or other biologicals, which ...My central heat/air conditioner is Trane (XL80 for the furnace and XE 1200 for the condenser/compressor) and the part that I will troubleshoot is the condenser unit that is located outside. Step 1 - Turned off the circuit breaker at the main panel. Step 2 - Removed the quick disconnect connector. Step 3 - Removed the access panel on the ...Post my answer. I have a 2000 Honda civic ex. The ac/heat worked great until a couple days ago. I noticed the fan was not blowing any air through the vents. Then all of a sudden it started blowing full blast, while the recirc, ac, rear defrost button lights all came on and were flashing...then it all turned off.... - 1996-2000 Honda Civic.The radiator fans on my Chevy Silverado 1500 stayed running when I shut the truck off. I tested the rad fan relays, fuses, and coolant temperature switch. I ...🚨 Note 🚨 - If you have replaced both the sensor and the thermostat and your trucks radiator fan still won't turn off, after replacing the appropriate parts...Well, I took my Pathfinder into the dealer today. $90 labor and a diagnostic later, it appears as though the car has a bad "Blower Control Amp." Evidentally this is a different part from the "Blower Motor Resistor" that is often attributed to this problem. The part is (so they say) $144.55 and labor can be anywhere from 1 to 2 hours.The radiator fan won't turn off and engine temperature gauge doesn't work.So we just replaced thermostat, cleared code (the car doesn't have check engine lig...blower fan wont shut off HELP! Hi All, I need help! I have a 2001 Ex 5.4 4wd. I shut down my ex jumped out, locked her up and came out two days later and she was deader than a door nail. charged battery (charger/starter) started her up and let her run for a while. Came back noticed the abs light was on, shut her down and noticed my blower motor ...Radiator Fan Won't Turn Off and Temperature Stuck at 160 Degrees: 2014 - 2019 Silverado & Sierra: Bad ThermostatIn the video Sean also goes over why the radi...LV2FIX. 65 posts · Joined 2020. #6 · Mar 29, 2023. My cooling fan was running non stop with the car turned off . Dealer is 4 minutes away and they replaced Relay 15 Been 6 months and no problem There are at least five Cooling Fan Relays in my MY17 OM Relays 1,5,6,12,15. MOONRNR.explorer_2. • 1 yr. ago. You probaly have a PO128, yea might be the temp sensor but like me (and many others) you probably just need to replace its thermostat. Has to do with differential between what it wants to see temp wise run time @ ambient + engine load ect and then reported temp, gets off by couple to many degrees it triggers failsafe ...Free fix for Chevy trucks when the dash lights and radio stay on when turning off the vehicle.Reply. 2009 - 2014 Ford F150 - Climate Control won't turn off - I have the dual-zone climate control which has been working (more or less) fine since I bought the truck in 2014. All of a sudden, the damn thing doesn't want to turn off. In fact, when I turn it off the fan speed cranks up to what feels like high or max!3. Bad ECU Unit. Your Chevy’s engine control unit signals the fan when to turn off or keep running. A defective ECU will result in the fan not knowing when to stop running. 4. Low Coolant Level. The car coolant is the liquid that removes heat from the radiator. The lower the coolant level, the less effective it’ll be.Recommended Services. The two engine fans are controlled by separate relays that are turned on by a powertrain control unit. The system is controlled through the body control module that signals the powertrain control unit. The body control module gets signals from the cooling system and the air conditioning to turn the fan on and off.Engine temps are usually around 200 degrees at operating temperature. If there is an issue with the cooling system, the computer will default to prevent the engine from overheating, even if it's not really overheating. In some cases it will even disable the A/C. You might have a problem with the cooling system, hard to say.Page 2- Cooling Fan won't turn off! 2016+ Camaro: 6th Gen Camaro general forum. You are browsing camaro6 Homepage: Garage: Wiki: Register: Community: Calendar: Today's Posts ... I've noticed from time to time my car having the fans stay on after shutting it off. My plan is to start some diagnostics this spring when & if it reoccurs. 01-24 ...The radiator fan won't turn off and engine temperature gauge doesn't work.So we just replaced thermostat, cleared code (the car doesn't have check engine lig...An empirial way to see if the engine is running hotter than it normally would is to let the engine idle for. a few minutes before shutting it down. The normal fan operation and the idling will cool the engine. If the. fans don't turn on after shutdown, that might indicate the computer is seeing an engine hot enough to warrant cooling with the ...Philly23 said: I have a '21 SXP and I have been experiencing an odd thing lately where I turn the climate control totally off but it keeps blowing hot air no matter what I do. It is a very low but very obvious blowing of warm air. Enough that I have to shut the vents. I have tried messing with all of the automatic climate settings, but it doesn ...#buhayautotechnician#buhayofwIt's located on the frame rail, next to the bottom of your radiator on the driver's side. If you pull out the air filter and air silencer boxes, you can access it from above. You can also access it from below if you jack up the vehicle or use ramps, but I still recommend pulling the air boxes for better access/visibility.Heater fan won’t run, Heater fan won't stop running - GM products, Ranier, Escalade, Avalanche, Silverado, Suburban, Tahoe, Sierra, Yukon, Envoy ... In some cases in cold weather the blower motor may not run, or if it does, it may not shut off when you turn off the vehicle. The TSB applies to the following vehicles with automatic ...The part I bought is the blower control module that goes next to the blower motor. ACDelco 15-81638 GM Original Equipment Heating and Air Conditioning Blower Control Module. 4.5 out of 5 stars 38 Reviews. Price: $28.98 Free Shipping for Prime Members.35 posts · Joined 2009. #1 · Jul 12, 2012. Up until today I have had no problems, but with the hot temps, I added a can of refrigerant to the AC system (just like every summer). When I went to shut the car off and remove the keys, the heater blower fan, just keeps blowing. The buttons and fan control have no effect, although I can still ...The fan starts running on high speed and continues to run loud about 5 min after I shut the truck off. I just got an oil change and a tune up but it’s still doing it Mechanic's Ass... Have a 2015 Chevy suburban with 113000 miles. The fan starts running on high speed and continues to run loud about 5 min after I shut the truck off.Don't hesitate to call Suburban's Customer Support line at (423)775-2131. They can help walk you through each step to locate the source of the problem. If there are still problems, they'll send a technician out to help.Remove control panel. Unfasten retaining screws to lift off the oven control console panel or trim ring. Locate old thermostat. Identify the current thermostat near the temperature control stem or wiring bundle. Disconnect wires. Unplug the electrical leads attached to the thermostat. Note wire positions.July 15, 2018 Cooling. The most common reason that your Air Conditioner fan won't turn off is because there is a stuck relay keeping the circuit closed. If it's not the relay, your thermostat likely has failed, or has a shorted cable. While there are other reasons, these are the most common. Before calling a service technician to start ...The symptoms of bad engine coolant temp sensor is the fan running once you switch on ignition and then running after ignition is turned off for 3-6 minutes. But that would be both fans running. Your listed symptoms pretty much point at the transistor controller circuit having a meltdown. RickHaleParker. Posts: 7119.2015 GMC Sierra 5.3. The other day I noticed my radiator fans constantly running at full blast and staying on for 5 minutes after shutdown - saw that the coolant temp gauge was pegged low. I replaced the coolant temp sensor and the problem is still there. Looking at the live data on my OBDII scanner, I can see that the coolant temp is reporting ...Originally Posted by JimD. The first thing to try is to remove the power from the furnace by pulling its fuse. I know you switched the power off but power may still be applied to the board to bypass the switch for cool down. Removing all power will reset the board logic (think computer reboot).2016 Chevy suburban with 5.3. 77K miles . Reactions: wishiknew. Jan 16, 2023 #2 Riverbottom ... Every once in a while the electric fans go into hyper mode and wont shut off. I have to disconnect the battery to get them to shut down. ... So the fan will stay on for 5 minutes after you turn the car off. Look at the engine temperature ...2016 Ford-150 The cooling fan will not turn off. Asked by Guru58L6Z Jan 27, 2018 at 08:43 PM. Question type: Maintenance & Repair. I started my truck to move it to a different spot in. the yard, it was only a very short distance. I turn. off my vehicle but the fan kept blowing at first I.Heater fan won’t run, Heater fan won’t stop running – GM products, Ranier, Escalade, Avalanche, Silverado, Suburban, Tahoe, Sierra, Yukon, Envoy GM has issued a technical service bulletin (TSB) #06-01-39-002B to address problems with the front blower motor.Lifehacker is the ultimate authority on optimizing every aspect of your life. Do everything better.The 2016 Chevy Silverado has an electric cooling fan that is controlled by the vehicle’s computer system. If this fan does not shut off, it is likely a problem with either the computer or the wiring connecting it to the engine. To diagnose and fix this issue, you should start by checking all of your fuses and relays related to the cooling ...The radiator fans on my Chevy Silverado 1500 stayed running when I shut the truck off. I tested the rad fan relays, fuses, and coolant temperature switch. I ...There are several potential causes for an RV furnace that won’t turn off, such as a malfunctioning thermostat or a problem with the ignition system. To fix the problem, you may need to do some troubleshooting and potentially seek the help of a professional mechanic. Regular maintenance and cleaning of the furnace can also help …The blower is supposed to stay on for a few minutes after the car is off. Look in your owners manual. I think it's primarily for cold weather, it keeps the car interior warm until the heater core completely cools down. Not to say you don't still have a problem separate from that.21 posts · Joined 2011. #1 · Jul 26, 2012. I'm was driving today down the highway with my ac heater unit off and all of a sudden it turned on by itself full blast. It will not respond to te dial and when I shut the truck off and pulled the fuse it stays on I had to pull the main blower fuse under the hood to stop it but the wierd thing was ...Mar 16, 2022 · The sensor had failed, making the gauge read "0". As a failsafe since it has no idea what the actual coolant temp is, the PCM commands both fans on high speed and keeps the A/C off to prevent extra heat from the condenser. It also runs the fans for about five minutes after the key is turned off. Watch the first eight minutes of this veideo:1) There is a high level of air in the system, and this number can be found by opening the low-pressure side valve on some radiators. 2) A thermostat might have gone bad or have dirt buildup on it, preventing it from properly regulating temperature and causing the radiator to turn off.This is new it has not come on before when I have the symptoms. Chevy Mechanic: AMEDEE. The check engine light illuminates for emission purposes only. It may or may not be associated with an engine running or performance issue (or transmission issue). Even if the check engine light is not illuminated on the dash or instrument cluster, there can ...