Why is my Subaru Legacy not heating up?

Possible Reasons for Subaru Legacy Not Heating Up
There could be several reasons why your Subaru Legacy is not heating up properly. Here are some possible causes based on the search results:
1. Thermostat Issue: One possible cause is a faulty thermostat that is stuck open, allowing coolant to continuously enter the engine. This can result in the heat feeling weak or not working at all, especially when the vehicle is moving at higher speeds.
2. Low Coolant Level or Air in the Cooling System: Another reason for poor heating performance could be a low coolant level or air trapped in the cooling system. Insufficient coolant can prevent the proper circulation of heat in the system, leading to inadequate heating.
3. Clogged Heater Core: A clogged heater core can also cause heating problems in the Subaru Legacy. The heater core is responsible for transferring heat from the engine coolant to the cabin. If it becomes clogged, it can restrict the flow of hot coolant and result in poor heating performance.
4. Malfunctioning Blend Door Actuator: The blend door actuator controls the flow of hot and cold air into the cabin. If it malfunctions, it may not allow hot air to enter the cabin, resulting in a lack of heat.
5. Other Possible Causes: Other potential causes for the heating issue in a Subaru Legacy include a faulty water pump, dirty cabin air filter, bad blower motor, or HVAC control unit malfunction.
It’s important to note that these are just possible causes based on the search results. To accurately diagnose and fix the issue, it is recommended to consult a qualified mechanic or Subaru dealership.
I hope this helps! Let me know if you have any other questions.

Why is my car blowing cold air but overheating?

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.

What are symptoms of bad thermostat in car?

Overheating is the most common symptom of a failing thermostat. Due to corrosion or aging, your car’s thermostat can get stuck in a closed position. If this happens, the thermostat will not let the coolant reach the radiator, and, as mentioned above, the engine will overheat, causing severe damage.

How do I fix my car from not heating up?

Ways to Fix Your Heat Issues at Home

1. Let your vehicle’s engine cool for 15 to 20 minutes, remove the radiator cap, and use a funnel to safely pour coolant.
2. Fill your new coolant until the reservoir is full.
3. After you’ve properly filled the coolant, replace the radiator cap and start the car to see it the heat comes on.

What would cause my car to not heat up?

In 90% of the cases, car heater problems are the result of one of the following reasons: The heater switching system might be faulty. The cabin air filter might be choked, restricting the airflow through the heater core. The thermostat valve might not be working right.

How do I know if my heater core is clogged?

In some instances the heat in your car may work just fine during mild cold spells. But fail when the cold gets really bad this. Situation is suggestive of a heater core that is partially clogged.

Why is my heating not getting hot in my car?

A common cause is a faulty thermostat. If it’s permanently stuck open then the car could be ‘overcooling’. You can remove the thermostat and test it in a pan of hot water, it should open just before it reaches the boiling point – usually around 95 deg C, then close as the water cools.

Why is my car blowing cold air but no heat?

A car heater can fail in several ways, but when it blows cold air, the two likely causes are that the coolant isn’t flowing through the heater core or air from the blower motor isn’t being directed through the heater core.

Why is my Subaru not blowing hot air?

The most common reasons a Subaru Outback heater isn’t working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.

Why is my car blowing out cold air when the heat is on?

If there isn’t enough coolant in your system, the heater core will blow cold air into your car. Solution: If you confirm that a low coolant level is the source of your problem, you simply need to top off your coolant. You may want to check for leaks as well if you just recently refilled your coolant.

What are the symptoms of a bad thermostat?

Watch for These 9 Signs of a Thermostat Going Bad

• The screen is dead.
• The actual temperature doesn’t match the display.
• Your AC or heater is stuck on.
• Your heating and cooling won’t turn on.
• Your HVAC is short cycling.
• Scheduled settings stop working.
• Nothing happens when you adjust the settings.
• Temperatures shift.