A faulty thermostat could be behind your car’s heater not working. With the heating system in a vehicle, there are many problems that can arise. The heater in your vehicle isn’t like a furnace that you’d find in a house. Coolant (AKA antifreeze) flows through the engine, absorbing heat from the rapidly-moving … Estimate price near me. He is very thorough and knowledgeable. Check Latest Price. The coolant in a newer vehicle may not need service until the vehicle reaches 60,000 miles.Â. If your car has not been overheating or running hot, your water pump is not the culprit. Make sure you can hear the fan running. Debris in the cooling system, such as rust particles or other goop, can potentially plug the heater core and block the flow of coolant. A different reason for the heat to not work would be a lack of coolant going through the engine. The heater may be doing its job. With a pair of pliers to hold it securely, place it in water and see if it opens as it should at a given temperature. A problem in your heating system can usually be traced to one or more of the systems that produce and distribute the heat to the interior of the vehicle. In the case of the heater, the same piping hot coolant runs through the engine, but is funneled through a much smaller radiator called the heater core. The system has several different components that work together to provide heat. Water pumps are belt-driven, and belts have a tendency to break and wear. If your vehicle's fans are not working correctly, check out this video to see how to resolve the issue! Diesel Air Heaters. If a thermostat is stuck in the closed position, it will never allow coolant to circulate fully, so no heat for you. Pour in the new coolant until the reservoir is full. Rarely do fuses fail for no apparent reason. Instead, you might have a failed thermostat, which opens and closes circuits in the cooling system as the engine heats up. How To Fix Low Antifreeze After letting the car cool, remove the radiator cap and place the funnel in the opening. But if the fan stopped working, that’s why heated air isn’t reaching the cabin of the car. The fan blows the heat away from the core and distributes it into the cabin of the car. Checked for incoming resistance ground to the blower, from the dash control switch and it works. The air conditioner in our 2004 Mazda Miata has honestly never worked so great--it always blew out warm air. If there is anything you would like to add, please feel free to leave a comment below. You can remove it from the engine for testing. There are a number of reasons why the heater might not be working properly. SELECT VEHICLE. Acura MDX - Heating AC - Indianapolis, Indiana. And that’s a bigger problem than not having a heater. Be sure that air pressure is … It can be tough to find why your Impala’s heater is blowing cold. With luck, any issues you have will become evident in warmer months, so you can fix them before winter sets in. I would no doubt use him again. A heater that's working properly should circulate air that's a toasty 75 to 100 degrees Fahrenheit. to keep the inside of the windshield from icing up in cold weather These are: The cooling system; The heater core; The heater … When your vehicle’s engine has cooled down, open … If the hose connected to the engine is warm, but the hose from the valve to the heater core (the hose that goes into your car) is cooler, the valve is in the closed position. Peter charged us only $202, plus performed the work at our home. It goes without saying that a properly operating heating system is important. Is the heater completely separate from the AC Compressor and my … All power to every one of the electrical working parts of the car is supplied via fuses. Unfortunately he was not able to repair or alleviate my problem. On top of that, if there’s no heat in the vehicle, it has no way to defrost the windows and mirrors to eliminate condensation and ice. Check that the vacuum hose is connected and not damaged. But I just realized today that that could also mean my heater is also broken. Air pockets in the heater core or a heater hose. First, be sure to check the fuse and make sure it isn’t blown. competitor quoted us a repair cost of a minimum of $1,400 and said that the cost would go up to $2,400 if they discovered an additional part was required. If there is anything you would like to add, please feel free to leave a comment below. I would use Matt again. Reasons your heating system isn't working. If your coolant system is topped off and working fine, and there aren’t any leaks, then it could be as simple as the fan not working. • A blower fan that isn’t working properly. Created on: 2019-11-20. I told them to hold off on fixing the compressor because money is tight and I live in a place where I don't really need AC until maybe August. If you notice that your thermostat gauge stays on the … Before I took it there, I had burned out the AC Compressor. A problem with the switch which turns the fan on or off, might also be the source of … But, using the info above about how and why a heater would fail can make it a lot easier. There is no battery to operate the blower. Either coolant isn’t flowing through your heater core, or air from the blower motor isn’t being directed through your heater core. Failure of any of these components may result in the same symptom. Before doing so, however, the mechanic will check the resistor, motor and fuse for proper operation. Service Location. Check all belts and hoses to make sure they are properly attached and not leaking. Replace the radiator cap. If it’s a repair you can’t make, or you can’t figure out what the problem is, have a mechanic assess your car’s heating system. Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM. If it isn’t opening up to let the coolant flow through it, the core can’t produce heat. customer ratings (59) $79.99 - $89.99. Get your car inspected at your home or office. Made with ♥ in Silicon Valley. A car's heater does not generate heat if the coolant level is low or restricted by buildup, if the water pump failed or if the thermostat is broken. He explained to us exactly what services were needed on our vehicle to repair the air conditioner and provided us with an written estimate of the cost. Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. Car makers used to rely on cables to change the position of the blend door to regulate the amount of heat. If it isn't it could be that the heater control valve is not working and needs to be replaced, or on older cars a physical flap which alters the path of the air could be broken, or disconnected from the controls. With YourMechanic you can skip the auto shop altogether. We just assumed it was how that particular car was manufactured. Check for blown fuses and replace them to restore normal functionality. He literally saved us thousands of dollars in repair costs. Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical guides, Check cars for recalls, common issues & maintenance costs, Hand-picked, community-rated professionals, Our mechanics make house calls in over 2,000 cities, Explore nationwide job opportunities for automotive technicians, Trusted mechanics, rated by thousands of happy car owners, Fleet maintenance with certified mobile mechanics, Volkswagen Beetle - Heating AC - Houston, Texas, i am well satisfied with Mr Smith working on my car(s). Also, a nonworking heater will adversely affect the way your defroster does its job, which will in turn hinder visibility, limiting your ability to drive safely. If you can’t hear it, first check the fuse to make sure it hasn’t blown. The main job of a fuse is to protect the electrical circuits in your car from shorting or overloading; i.e., a fuse protects the wire or wires they are connected to from overheating and catching fire. Here is what to check if your heater or defroster isn't working: Coolant/Air lock - Did you top off the coolant as described above? © An air pocket in the heater core or a heater hose may be interfering with the flow of coolant through the heater core. document.write(new Date().getFullYear()) A blown fuse might just be the reason your car heater fan is not working. Back Seat Car Heater. However, checking the seat heater element requires taking the car seat apart, so you should begin by checking for other problems, working your way to the seat heater element as a last resort. Thermostats can also get stuck open causing the engine’s temperature to stay low.  If the thermostat is the culprit, you may have bigger problems because the vehicle will start to overheat. In some cases, the problem might have nothing to do with coolant: If your blower only works on the highest setting, your blower motor control module probably needs to be changed. YourMechanic All rights reserved. If you have a low coolant level, make sure you don’t have any leaks in the system. When a car’s heater is not working in the middle of winter, it can make your daily commute miserable and cold. So manufacturers switched to small electric motors called actuator to vary the blend/air mix door positions. But, using the info above about how and why a heater would fail can make it a lot easier. Fuses are rated by their amperage and are designed to blow or open when the current being drawn through them exceeds their design rating. Or not if your car heaters are not working. Book a mechanic to perform a thorough inspection as soon as possible. Here are the most common ones: Keep in mind that the warm air that rushes into your car in the byproduct of the heat of the coolant in your vehicle's engine. Check to see if the coolant is circulating through the heater core by feeling both heater hoses. Once the engine reaches its operating temperature (generally about 200 degrees F, 95 degrees C), the thermostat opens, and the fluid starts flowing. If the fan isn’t working, you probably need to have the blower motor fixed or changed. If it seems to be in good working order, take a look at the fan. Cables would bind and stick, causing all kinds of problems. Clear visibility is essential for safe driving conditions. Ken Mattson, owner of Len’s Automotive in Bellevue, Wash., says a car heater can stop working for a number of reasons, including: • A low antifreeze/water level in the radiator due to a leak in the cooling system. To check for a plugged heater core, start the vehicle and allow the engine to warm up to normal operating temperature while turning the heater to its hottest setting. If that coolant is low or contaminated, you have a problem. Matt was courteous and on time. As we said earlier, a diesel air heater is going to provide … When a car heater doesn't work, the most common cause is low coolant. If cold air is coming out of the heating vents, even when the vehicle is warmed up and the thermostat is set to hot, you could be dealing with one of the following problems: Low coolant A blockage in the heater core A stuck blend door A stuck heater valve A bad switch or linkage This is more common with older cars. In the latter, coolant circulates through the engine, absorbs heat, and dispels it into the outside air by way of the radiator. Blower Motor or Resistor? If the coolant is where it should be, take a look at the fan. The reason your car ’ s simply a nuisance to regulate the flow of.... 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