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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.Low speed operation is due to 12V power being passed on to the two cooling fan motors in series. When you turn off the engine, and the fans operate on low speed, pull out the third relay and see if the fans stop. 2008 Sprinter 2500 170 - camper van. 2001 Suburban LT 2WD, 5.3, V8 311,000 miles, leaks oil now at rear main seal.Once the temp gets so hot, the ECU commands the radiator fan to come on. If your Suburban has a bad engine temp sensor the radiator fan won’t know to come on, because the ECU won’t know how hot the engine is. You’ll need to locate and test the engine temp sensor. Depending on the model year and engine, the location varies. This video covers the part that needs to be replaced when your GM vehicle marks no engine temperature on the dashboard. Other symptoms may be the radiator fa... As temperatures increase, the clutch engages so that the fan is driven by engine power and moves air to cool the engine. A fan clutch will make a rather loud roaring noise when first started.2016 suburban electric fans. Thread starter 69hondo; Start date Jan 16, 2023; Jan 16, 2023 #1 69hondo Well-Known Member. Joined ... My 2015 just started the same thing. 95,XXX miles. I noticed lately, the temp has been running cooler. ... So the fan will stay on for 5 minutes after you turn the car off.First, find the cooling fan relay, usually mounted in the fuse box. Once you find the fan relay, remove and inspect it thoroughly to ensure it is okay. If there is physical damage, replace it with a compatible cooling fan relay. After relay replacement, test and ensure the problem is removed. Problem 4: Broken ThermostatSolution to radiator fan continuing to run when engine is off. I have posted here before about an intermittent problem with the radiator fan staying on after the engine is shut off. The strange part was that when the problem happened the coolant temp gauge on the dash would drop to dead cold. It would create a faulty coolant temp code and as ...#buhayautotechnician#buhayofw Replace the thermostat. A p0128 fault commands the fans to high and has the temp gauge read 0. Clearing the code will have the temperature read correctly which shows the sensor is working. Source: GM tech that has replaced hundreds 2015 Chevy Silverado Radiator Fan kicking on and won’t go off for 5 min after engine shuts off. Temperature gauge is not working. Stays at 0. ... Replace the thermostat. A p0128 fault commands the fans to high and has the temp gauge read 0. Clearing the code will have the temperature read correctly which shows the sensor is working.Got a 2015 Tahoe the electric fans stay on after I cut the truck off. I changed out the thermostat and the temp sensor, but I can’t figure out the problem, now the heater blows cold air and the air blows hot air I’m lost please need help TIA.A coolant fan switch is a small and very simple switch comprised of typically two wires. This switch is configured to work based upon the temperature of the engine. ... In other cases, the switch will turn on and stay on well past the cooling temperature threshold, resulting in the fan running even when the engine is off. 3. Broken or shorter ...6 Common Reasons Your Chevy Suburban Fan Keeps On Running. The most common causes for your Chevy Suburban fan to continue running even when you’ve turned off the engine are related to faults found in the fan relay, the temperature sensors, the ECU unit, the high-pressure switch, the coolant liquid, or the thermostat.Dec 28, 2019 · Fans start running within 10 seconds of startup, regardless of outside temperature. I have noticed that when fans are running, fan speeds vary from time to time; cant identify any consistencies as to why fan speeds vary. Fans stop almost immediately after turning off the ignition. 2015 Sierra 1500 5.3 Cooling fans not running/fan relay. Hi, I am having some issues with my cooling fans. I have a 2015 Sierra 1500, 5.3 WT. I cannot get the cooling fans to turn on. The truck will overheat before they kick on. I tried to force them on through hp tuners scanner and nothing. Both fan fuses are fine and I do not have any …487 subscribers. 61K views 4 years ago. ...more. This video covers the part that needs to be replaced when your GM vehicle marks no engine temperature on the dashboard. Other symptoms may be the...The ABS light comes on in the dashboard of Chevy Suburban when one or more of the wheel speed sensors have malfunctioned, brake fluid is too low, the fuse is blown or the relay is bad, tire pressure is low, or if the ABS module has developed a defect. When the ABS light / comes on in your Suburban, the anti-lock braking system is disabled.Learn how to fix a cooling fan that keeps running even when the key is off. Watch this video for a simple solution for Chevy vehicles.Some of the most common symptoms of a bad thermostat are no heat, a spiked temp gauge, a blown head gasket, and more. A thermostat failure can only happen in two ways. The thermostat stays in the closed position and won’t let coolant through when the engine reaches operating temperature. Or, the thermostat will stay open, and the coolant will ...My 2018, chevy colorado -fan stays on 5 minutes, after shut off.. first time last Thanksgiving, then didn't do for 10 weeks, sensor sticking?! 60K miles. Dealer says today water pump and sensor.. was $1500, I just came out of warranty, they're doing for $250 plus I pd $130 for diagnostic today. ... 2015 Chevrolet Silverado 1500 LS Crew Cab RWD ...1) My 2015 Yukon Denali’s engine temperature gauge intermittently reads zero and the cooling fans come on where the computer assumes the sensor has failed so the car goes into a protective safe mode (fans run constantly - better too cool than too hot). if the Car is shut off with the fans running, they start up again when the car starts and ...The most common causes that hinders normal operation of air conditioning system on your Chevy Suburban are dirty cabin air filter, refrigerant leak, dirty or clogged condenser, dirty or clogged evaporator, bad blower motor, defective compressor, faulty blend door actuator or any fault in the electrical system. 1. Dirty cabin air filter.

Depending on the wiring setup of your Volkswagen, the coolant fans may keep running even when the ignition is off. If the coolant fan runs for a long time, it will likely drain your vehicle’s battery. Since the fan relay is a crucial component of your vehicle’s cooling system, vehicle owners should take it very seriously.I have a 2005 GMC 1500 Sierra 5.3 with the dual electric fans. The truck has 205K miles on it, and it has been a good truck. I bought it new in 2005. This past week, I had to jump start the truck, since the battery was dead. After jumping it off and driving it, I got home and noticed the electric fans staying on after the engine is off and keys ...I had this same problem. The Radiator would turn on first thing in the morning and stay on. I looked it up and its a fail safe when the Radiator Fan Control Module is ready to be replaced. The module is no longer telling when the fan to turn off/on anymore so it just bypasses the module and the fans stay on.Unplug the a/c high pressure switch. If the ECM sees that the high pressure is very high it will command the fans to be on, in an attempt to lower the pressure. If the fans kick off when you unplug the sensor you have found the issue. If not, I'd say take it to someone that has access to the factory scan tool and service information to diagnose it.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.

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Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Replace the thermostat. A p0128 fault commands the fans to high and h. Possible cause: Yes, actually it did. When the sensor fails, the radiator fan runs at full.