My heater is blowing air through the driver side air vents but is blowing cold air through the passenger side and rear console ven
My heater is blowing warm air through the driver side air vents like normal but is blowing cold air through the passenger side and rear console vents . My truck is climate controlled with driver and passenger side. What do you think is the main cause and how much will it cost to repair?
My car has 67000 miles.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
Hi there:
Climate controlled vehicles have multiple electrical relays that open and close vents to maintain the desired temperature. In some instances, these relays can wear out overtime. However, it’s also common for debris to clog up vents (especially side vents) which may restrict the flow of cool air. The best way to determine why your AC is not working efficiently, it might be best to have a professional mechanic complete a AC inspection; so they can pinpoint the source of your issues and recommend the right repairs.
How to Identify and Fix Common car Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
Usually cars that blow cold on one side of the dash and warm on the other side, are typically equipped with a dual zone climate control system. Dual zone systems allow the driver and front passenger to adjust respective temperatures to their comfort levels.
Either the engine is not getting to operating temperature, which means the thermostat needs to be changed out, or it is low on coolant, or the cooling system needs to be purged from air pockets, or the climate control blend door is not working. Check to see if the heater hoses are getting hot.
the problem is the heater bend doors. this part controls all direction of heat or air. there is one for each side of the car. replacing takes about 30 min.
The most common reasons a Ford F-150 heater isn`t working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.
A car A/C blowing hot air is often the result of a refrigerant leak. Refrigerant is a liquid that circulates through your car`s A/C system, expanding and contracting as it removes heat and humidity from the cabin. None of the other A/C components will function correctly without proper refrigerant levels.
If your coolant level is a-okay, but your car heater is blowing cold air and your engine is overheating, then you have a clog in your cooling system. Conversely, if your engine temperatures are unrealistically low after a drive, your thermostat is likely the culprit.
If you find your furnace blowing cold air, you may have a dirty or clogged air filter. To make sure, remove the air filter and inspect it. If it`s clogged with dust, clean it with compressed air or wash it in warm water with mild soap or just buy a new one.
The most common cause of a furnace that blows cold and warm air intermittently is a thermostat fan setting that is set to ON. Furnaces run in heating cycles and only produce hot air for short bursts of time. When your fan setting on your thermostat is set to AUTO, the fan only blows when the furnace is heating the air.
Faulty heater cores and low or contaminated coolant levels often come hand in hand, and both issues may lead to your engine overheating and your heater not blowing hot air.
Troubleshooting Tips For Furnaces Not Blowing Hot Air
Make sure your thermostat has not been set to a lower setting by someone else. Check your thermostat`s batteries and replace any that are exhausted or defective. Clean all of the parts of your furnace, especially the ones that are susceptible to dust and dirt.
Here are some of the most common causes of why air doesn`t flow out of your vehicle`s vents: Your air intake is clogged, meaning that air isn`t getting in from the outside at all or isn`t circulating properly. There is a blown fuse in the ventilation system. Electrical issues such as a bad relay.
A malfunctioning thermostat, no matter what kind it is, can cause a number of problems for your heater, ultimately hurting its effectiveness and efficiency. For instance, a thermostat sending incorrect signals—or no signals at all—can result in a heater that won`t even start up.
Warm air may blow from your vents if there is a big enough leak in your home`s ductwork. The ducts within your home deliver cool air throughout, but if there is a leak, warm air can be mixed into the already cooled air, producing warmer than normal air blowing from your vents.
Low refrigerant pressure can cause the left side to blow warmer air than the right side, but in no case will low pressure cause the air on one side to be warmer than the outside air. Your problem is that the left side heater is stuck on.
Low refrigerant pressure can cause the left side to blow warmer air than the right side, but in no case will low pressure cause the air on one side to be warmer than the outside air. Your problem is that the left side heater is stuck on.
If your air conditioner is blowing out warm air, your unit`s refrigerant levels might be low. This usually indicates a refrigerant leak in your system! If that`s the case, your air conditioner will continue to run and blow out warm air, trying to reach the temperature you set on your thermostat.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
My heater is blowing air through the driver side air vents but is blowing cold air through the passenger side and rear console ven
ANSWER : Hi there:
Climate controlled vehicles have multiple electrical relays that open and close vents to maintain the desired temperature. In some instances, these relays can wear out overtime. However, it’s also common for debris to clog up vents (especially side vents) which may restrict the flow of cool air. The best way to determine why your AC is not working efficiently, it might be best to have a professional mechanic complete a AC inspection; so they can pinpoint the source of your issues and recommend the right repairs.
Heater air is blowing out cold on the passenger side of the vehicle when the heater is on, warm on driver side 2011 Dodge Journey
ANSWER : Hello – your "no heat" problem sounds like an ambient air temperature sensor on the passenger side with problems, or a malfunctioning air blend door inside the heater air box. I would recommend a heater inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.
hot air blows out driver side vents but only cold air out passenger side vents?
ANSWER : Hello, thanks for writing in about your Toyota 4Runner. Your A/C has separate temperature control actuators on the A/C evaporator case and the passenger side one may be stuck in cold position. Replace the actuator and it should fix the problem. If you decide to get this fixed, consider YourMechanic, as a certified technician can diagnose the issue with your AC and help you fix the actuator if necessary.
Hot air only blows out on passenger side and cold air on driver side. What can it be?
ANSWER : The problem may lie behind or under the dash. Causes can range from the heater control cable or motors, not properly moving blend doors, or even a broken or detached blend door. The blend doors vary their position depending on input from the cable or motor (depending on the vehicle). If the motor is shorted or cable broken, the blend doors will not move properly and only send air (hot or cold) based on the position it is stuck in. This can cause varying air temperature at different vent locations.
You may want to take the vehicle to the local dealership, or find a repair shop that specializes in heating and air conditioning.
I am having issues with the defroster blowing cold air on the driver side
ANSWER : Hi there. There is a blend door issue on your ducting to your heating and air conditioning system. Check all of the blend doors and make sure that they are working. The blend door that is not working properly can have a bad motor or a vacuum line leak. Look for any vacuum lines that may be disconnected and also any blend door motor wires that may be exposed causing a short. If you need further assistance with your driver side having reverse effects of blowing air over the rest of the vehicle, then seek out a professional, such as one from Your Mechanic, to help you.
My heat blows out of the passenger vents but blows cold air out of driver vent…what is the issue???
ANSWER : Hey there. The temperature blend door on the left side is not switching from cold to warm. The temperature actuator needs to be replaced and the linkage checked. Have a local expert inspect the cooling system to verify these issues and move forward with the proper repairs.
air conditioner not blowing air from dash vents, but blowing air from side vents
ANSWER : A few different items can cause the air to not blow out of the dash vents. The most common are a blend door or a control switch. The best method for the AC diagnosis feature can be found in the vehicles owners manual. I recommend having your AC checked by a qualified technician, such as one from YourMechanic, to have the problem diagnosed and repaired correctly.
When the hot air is turned on, the drivers side blows cold and passenger side blows hot.
ANSWER : Hi there, thanks for writing in. On most imports and some domestic cars, there the AC blend door distributes the air to different vents when the option is selected. This component is controlled by an electric actuator. Sometimes the fuse to the actuator or the component itself is responsible for the condition you’re experiencing. If you’re buying a used vehicle, you might want to contact one of our local mechanics to complete a pre-purchase vehicle inspection.
