Engine overheating, cooling fan not working, continuous running of the cooling fan, engine check light on, the air conditioner’s poor performance, harsh fan noise, and relay swapping. You can know if your cooling fan relay is bad if you are experiencing any of these signs. How Do I Know If My Cooling Fan Relay Is Bad? In order to reduce the temperature of the coolant, the fan will run for a few minutes. When you turn off the engine, the car’s computer detects that the radiator has reached a higher temperature and should be cooled further. The coolant absorbs heat after operating your engine and has to be cooled. Is It Okay For Fan To Run After Turning Off Engine? When there isn’t enough of it, the engine heats up and the ECU will instruct the fan to stay on. The coolant removes heat from the car engine maintaining optimal temperatures within the system. Yes, a low coolant can cause your car’s fan to stay on. Frequently Asked Questions Can Low Coolant Cause The Fan To Stay On? This includes both labor and parts prices. The cost range for replacing a thermostat in a Chevrolet Cobalt typically falls between $460 and $485 on average. Clear the CEL (Checking Engine Light) before turning on the engine again. Replace your thermostat with a new OEM one. Don’t do this when your engine is still hot, or you’ll risk damaging the engine. If the coolant levels are low, top it up by pouring fresh ones to the correct level. You can negotiate a fair price, but that depends on the technician. The ECU costs between $500 and $2000 for parts and labor. If your fan runs continuously, you should check the ECU unit for fault and replace it if that is the reason.Ĭomponent repair is not always easy because it comprises wires and sensors a replacement is the best course of action. Check the ECU Unitīecause your car ECU unit is responsible for the temperature limit setting and informing the fan relay when to turn off and on. The estimated labor costs range from $53 and $67, whereas the parts are priced between $245 and $268. Replacing the engine coolant temperature sensor will cost between $298 and $335. If it stops, then the sensors are faulty and need replacement. Unplug the sensors and check if the fan will stop. Often, the problem lies in the temperature sensors. The estimated labor costs for the job fall within the range of $26 to $33, whereas the cost of parts is fixed at $18. Fan relay replacement costs average to around $44 and $51. If the problem does not continue, you should replace the fan relay. The way to determine if the fault is from the fan relay is by replacing it, running it, and determining if the problem persists. Here are some solutions to why the Chevy Cobalt fan won’t turn off even when the engine is powered off: 1. Solving your Chevy fan’s problem is easy because the likely causes are few.
#2008 CHEVY COBALT THERMOSTAT HOW TO#
How To Fix Your Chevy Cobalt Fan That Stays On Bad ThermostatĪnother component in the cooling system that can cause your radiator fan to continue spinning even when the engine is off is a bad thermostat. The high-pressure switch is usually located under the air box. Faulty High-Pressure SwitchĪlways check your high-pressure switch even if it looks brand new.
Technically, a little coolant will dissipate little heat, and the temperature sensor will signal the ECU to turn on the fan and cool the engine. The lower the coolant level, the less effective it’ll be. The car coolant is the liquid that removes heat from the radiator. A defective ECU will result in the fan not knowing when to stop running. Your Chevy’s engine control unit signals the fan when to turn off or keep running. If the temperature sensors are bad, they send the wrong result to the ECU, and what is the result? Your vehicle’s fan will keep running even if the engine is completely shut down. They are responsible for giving off the feedback your vehicle fan needs. The sensor monitors the temperature produced by the thermostat and/or the coolant. This is described as a relay short, and the consequence is a power trip. It controls the entire action of your Chevrolet fan hence, a fault in it will result in it running even with the engine off. Your fan motor relay acts as a switch that turns off or on the cooling operation according to the engine temperature limit. Here’s why your Chevy Cobalt fan stays on continuously: 1.
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