What would cause both heated seats to stop working?
Heated seats are a luxury feature that many drivers rely on during colder months. However, when both heated seats suddenly stop working, it can be frustrating and inconvenient. Understanding the potential causes can help you diagnose the issue and determine the best course of action for repair. Below, we’ll explore the most common reasons why both heated seats might fail simultaneously and what you can do about it.
1. Blown Fuse
The most common reason for both heated seats to stop working is a blown fuse. Heated seats typically share a fuse in the vehicle's electrical system. If this fuse blows, it will cut power to the heating elements in both seats.
- Check your vehicle’s owner manual to locate the fuse box and identify the specific fuse for the heated seats.
- Inspect the fuse for any visible damage, such as a broken filament or discoloration.
- If the fuse is blown, replace it with one of the same amperage rating.
Replacing a blown fuse is a simple fix, but if the new fuse blows again, it could indicate a deeper electrical issue that needs professional attention.
2. Faulty Seat Heater Switch
The seat heater switch is responsible for activating the heating elements in the seats. If the switch is faulty, it may prevent the seats from heating up.
- Test the switch by toggling it on and off to see if there is any response.
- Use a multimeter to check for continuity in the switch circuit.
- If the switch is defective, it will need to be replaced.
A malfunctioning switch is less common than a blown fuse but can still occur, especially in older vehicles or those with frequent use of the heated seats.
3. Wiring Issues
Damaged or disconnected wiring can also cause both heated seats to stop working. The wiring that connects the seat heaters to the power source and control system may become frayed, pinched, or disconnected over time.
- Inspect the wiring under the seats for visible damage or loose connections.
- Look for signs of wear, such as exposed wires or melted insulation.
- Repair or replace damaged wiring as needed.
Wiring issues can be tricky to diagnose and repair, so it’s often best to consult a professional if you suspect this is the problem.
4. Heating Element Failure
The heating elements inside the seats can wear out over time, especially in vehicles with high mileage or frequent use of the heated seats. If the elements fail, the seats will no longer produce heat.
- Test the heating elements using a multimeter to check for continuity.
- If the elements are not functioning, they will need to be replaced.
- Replacing heating elements often requires removing the seat upholstery, which can be a complex process.
Heating element failure is a less common cause but can occur in older vehicles or those with manufacturing defects in the seat heaters.
5. Control Module Malfunction
Modern vehicles often use a control module to manage the heated seat system. If this module malfunctions, it can prevent the seats from heating properly.
- Check for error codes using an OBD-II scanner to identify issues with the control module.
- Reset the module by disconnecting the battery for a few minutes, then reconnecting it.
- If the module is defective, it may need to be reprogrammed or replaced by a professional.
Control module issues are rare but can occur in vehicles with advanced electronic systems.
Conclusion
When both heated seats stop working, the issue is often related to a shared component, such as a fuse, wiring, or control module. While some problems, like a blown fuse, can be resolved quickly, others may require professional diagnosis and repair. If you’re unsure about the cause or how to fix it, don’t hesitate to bring your vehicle to a trusted auto repair shop like Kevin’s Autos. Our experienced technicians can quickly identify the problem and get your heated seats working again in no time!
Frequently Asked Questions
Is it expensive to fix heated seats?
The average cost for a Seat Heater Replacement is between $678 and $713. Labor costs are estimated between $134 and $169 while parts are typically priced around $544. This range does not include taxes and fees, and does not factor in your unique location.
How do you reset the module on a heated seat?
Sometimes a reset can resolve issues. Disconnect the seat's electrical connector for about 5 minutes to reset the module.
How much does it cost to fix heated seats?
There are a number of reasons why the heated seats could stop working, but in most cases, there's probably an electrical fault somewhere. A seat heater replacement costs between $660 and $695, including labor fees, which can range anywhere between $130 and $170. Parts are typically priced around $520.
What powers heated car seats?
Heated seats have a heating coil under the seat cover. When you turn on the heated seat, electricity from the battery flows to the heating coil in the seat cushion to warm it up. Heated seats in some vehicles have thermostats built into them to prevent overheating. The thermostat works just like the one in your home.
Can you replace heated seats?
Yes no problem, they are completely independent so you can install just a driver-heated seat, just a passenger-heated seat, or both.
How do you fix heated seats?
Disassemble the seat, separating the back and base, and removing the cushion and leather from the base. Replace all heated seat parts, including the heating element and the wiring. Put the seat together again. Reconnect the wiring.
What are the problems with heated car seats?
Heated Car Seats Could Pose Burn Danger Burn specialists, a safety group and NHTSA are investigating this issue. Some problems stem from heated seats used by people who lack feeling in their lower extremities.
What controls heated seats?
As with the lights in your car, the heated seats are controlled by a type of switch called a relay. A relay allows a small electric current to control a much larger one. When you flip the switch to turn on the seat heater, a small current flows through a coil in the relay. Near this coil is an open switch.
What causes my heated seats to stop working?
heating elements could be burned out, loose connection under the seat or the switch is not working. Have a look under the seat for loose connections first. The heating elements burning out are a common issue, do you have cloth or leather seats?
Can heated seats wear out?
Damage to upholstery: Over time, the heat can cause leather upholstery to crack and fabric seat covers to rip, which may require upholstery repair. Impacts gas mileage: Heated seats also use additional engine power, which lowers fuel economy.
