Why Does My Blower Motor Stay On Even When Ignition is Off?

AvatarByCarl Frisch

When the ignition is turned off, the blower motor should stop running. If the blower motor stays on with the ignition off, this could be an indication of a faulty relay switch, a short in the wiring, or an issue with the motor itself. It is important to have this issue checked out by a qualified mechanic as soon as possible, as it could be a safety hazard. The mechanic will check for any visible signs of damage and run diagnostics to determine the cause of the issue. They may need to replace any faulty parts and make any necessary repairs to ensure that the blower motor is working properly.

Automobile: Blower Motor Stays On with Ignition Off


Common Causes of Blower Motor Staying On with Ignition Off



A blower motor staying on when the ignition is off can be caused by several different issues. Faulty power relays, a worn out wiring harness, a defective blower motor, and a faulty blower motor resistor are all common causes. It is important to diagnose the source of the problem in order to make sure that it is addressed and repaired properly.

Diagnosing the Problem



The first step in diagnosing this issue is to inspect the relay and wiring harness for any loose connections or worn out parts. If any of these components appear to be damaged or not working properly, they should be replaced or repaired as soon as possible. The next step is to test the resistor and motor for any signs of damage or malfunction. If either of these components seem to be causing the issue, they should also be replaced or repaired. Once all components have been inspected and tested, it will become clear what source of the problem is and can be addressed accordingly.

Repairing a Malfunctioning Blower Motor



If any of the components are found to be defective or malfunctioning, they need to be replaced in order for the blower motor system to work properly again. Replacing a faulty relay or resistor is relatively simple and straightforward; however, installing a new wiring harness can often require more extensive work due to its complexity. In some cases, replacing the entire blower motor may be necessary if it has reached its maximum lifespan or has sustained major damage.

Preventative Maintenance for Your Automobile’s Blower Motor System



One of the best ways to ensure that your automobile’s blower motor system remains functioning properly is by checking for loose connections and worn out parts regularly. This will help identify any potential problems before they become more serious issues that require costly repairs or replacements. Additionally, it is important to replace parts as needed in order to keep your vehicle running smoothly and efficiently over time.

Auto Repair Shop Services for Your Vehicle’s Blower Motor System



If you are having trouble diagnosing an issue with your vehicle’s blower motor system, an auto repair shop can provide services such as blower motor repair or replacement, relay and resistor testing, as well as other necessary repairs or replacements. By taking your vehicle into an experienced auto service shop you can rest assured that all parts are inspected thoroughly before being worked on in order to make sure that your vehicle gets back on the road safely and quickly!

Understanding How Automobile Blower Motors Work



Automobile blower motors are responsible for circulating air through the cabin of a vehicle. The blower motor is usually located under the dashboard and is powered by electricity from the vehicle’s battery. The air conditioning system’s compressor pumps refrigerant through an evaporator inside the cabin to cool the air, while a fan blows the cooled air into the cabin. The blower motor then moves this cooled air through the vents in order to cool down the interior temperature of the car.

In order for a blower motor to work properly, it needs to be well-maintained and properly functioning. Most vehicles have two types of blower motors; permanent magnet and series wound motors. Permanent magnet motors use permanent magnets mounted on a rotor shaft which rotate inside an electromagnet field, while series wound motors are powered by alternating current (AC) and consist of several windings that are connected in series with each other.

The Basics of an Automobile Blower System



An automobile blower system is composed of several components including an electric fan, a fan clutch, a blower motor, and an evaporator core which helps to cool down hot air as it passes through it before entering into the cabin of the vehicle. The fan clutch is responsible for controlling when the fan turns on and off in order to regulate airflow within the system. As hot air passes through the evaporator its temperature drops, allowing colder air to enter into the cabin from outside sources. The blower motor then circulates this cooled air around inside of your vehicle’s cabin so that you can remain comfortable at all times during your drive.

Types of Systems Used in Different Vehicles



The type of automobile blower system that you have will depend upon what kind of vehicle you drive and what type of climate your area is typically known for experiencing. In areas with mild weather conditions, vehicles may be equipped with only one type of blower system; either a single speed or two speed setup which has only one or two settings respectively for controlling how much cold air can enter into your car’s cabin at any given time. In areas with harsher weather conditions however, vehicles may be equipped with more complex systems such as four speed or variable speed systems which allow you to adjust how much cold air can enter into your car’s cabin based on what kind of temperature changes you may be experiencing outside at any given time.

Common Issues with Automobile Blowers



One common issue that can occur when it comes to automobile blowers is that they can become stuck in one setting or may not turn on at all due to malfunctioning parts within its internal components such as its relay switch or wiring harnesses becoming loose or damaged over time due to wear and tear from regular use. Additionally, some people may experience vibrations or unusual noises from their cars’ blowers due to faulty bearings within their motors that need replacing in order for them to function correctly once again.

General Tips on Troubleshooting Automobile Blowers



If you notice any unusual noises or vibrations coming from your automobile’s blower motor, then it is important that you check all relevant fuses and relays first before taking any further steps towards troubleshooting it yourself in order to make sure there aren’t any electrical problems causing issues with its performance before turning off any power sources connected directly to it such as its battery cable connections or power distribution centers located near its engine bay area if possible so as not risk damaging any surrounding components within your car’s electrical system during repairs being made.. Additionally, if you notice visible signs of damage on any parts within its internal components such as cracked plastic housings around its fan blades then these should also be replaced immediately since these can prevent cold air from entering into your car’s cabin properly if left unattended over time which could lead further issues arising down line should they go unchecked for long periods without being noticed right away by someone qualified enough in automobile maintenance work who could identify them quickly when inspected up close during repairs being made accordingly afterwards..

Tips on Choosing an Auto Repair Shop to Diagnose and Repair Your Automobile’s Blower Problems


When looking for an auto repair shop that specializes in diagnosing and repairing problems related specifically dealing with automobile blowers it is important that you take time out beforehand research customer reviews online first so that you can get an idea about what other customers have been saying about their experience working with them previously before committing yourself financially towards having them carry out repairs being made successfully afterwards.. Additionally, if possible try asking friends & family members who have gone through similar experiences themselves recently about where they chose to go after having their cars checked out so that way you will know ahead of time whether or not they were satisfied with results received after having their cars serviced by particular auto repair shops nearby since this could determine whether or not those same shops would be well suited towards working on yours too depending upon how credible sources informing them about particular shops were taken overall when making decisions based upon them afterwards..

FAQ & Answers



Q: What are the common causes of a blower motor staying on with the ignition off?
A: Common causes of a blower motor staying on with the ignition off include a faulty power relay, a faulty blower motor resistor, worn out wiring harness and a defective blower motor.

Q: How do you diagnose the problem?
A: To diagnose the problem, you should inspect the relay and wiring harness, test the resistor and motor, and confirm the source of the problem.

Q: What do you do to repair a malfunctioning blower motor?
A: To repair a malfunctioning blower motor, you should replace any faulty relays or resistors, install a new wiring harness, and replace the blower motor.

Q: What is involved in preventative maintenance for your automobile’s blower motor system?
A: Preventative maintenance for your automobile’s blower motor system should involve regularly checking for loose connections and worn out parts, as well as replacing parts as needed.

Q: What services can an auto repair shop provide for your vehicle’s blower motor system?
A: An auto repair shop can provide services such as blower motor repair or replacement, relay and resistor testing, understanding how automobile blowers work, diagnosing common issues with automobile blowers, general tips on troubleshooting automobile blowers and tips on choosing an auto repair shop to diagnose and repair your automobile’s blower problems.

In conclusion, the blower motor staying on with the ignition off is a common problem in automobiles. It is usually caused by a faulty blower motor resistor, which needs to be replaced. However, there could be other causes, such as a bad relay or a faulty switch. To properly diagnose and repair the issue, it is best to consult a certified mechanic.

Author Profile

Carl Frisch
Carl Frisch
With more than 30 years in the bicycle industry, I have a strong background in bicycle retailing, sales, marketing and customer service. I have a passion for cycling and a dedication to excellence. As a manager, I worked diligently to increase my capabilities and responsibilities, managing up to eleven mechanics (at Palo Alto Bicycles) and later as a working partner in my own store.

As the shop owner of Spoke n’ Word Cycles in Socorro, NM, the success of the mission was my responsibility, which I pursued passionately since we opened in 2003 through the spring of 2011. I am adept at managing owned and loan inventory, preparing weekly & annual inventory statements, and managing staff. The role as managing partner also allowed me tremendous freedom. I used this personal freedom to become more deeply involved in my own advancement as a mechanic, to spearhead local trail building, and advocating for cycling both locally and regionally.

As a mechanic, I have several years doing neutral support, experience as a team mechanic, and experience supporting local rides, races, club events. I consistently strive to ensure that bicycles function flawlessly by foreseeing issues and working with the riders, soigners, coaches and other mechanics. Even with decades of experience as a shop mechanic and team mechanic, and continue to pursue greater involvement in this sport as a US Pro Mechanic, and UCI Pro Mechanic.

Similar Posts