Why is my engine blowing cold air?

Why is my engine blowing cold air?

If one or more of these issues is present, your vehicle may blow out cool air rather than heat: Not enough coolant in the engine. Problems with the heater core. Clogged or broken heating controls.

What are the symptoms of a bad heater core?

Symptoms of a bad heater core — and solutions

• You have little or no heat inside your car.
• You smell coolant inside your vehicle.
• Your windows fog up.
• You see signs of a coolant leak under the dashboard.
• Your coolant level is dropping, or your engine is running hot.

Can a thermostat cause no heat?

Thermostat. A faulty thermostat could be behind your car’s heater not working. If it isn’t opening up to let the coolant flow through it, the core can’t produce heat. Thermostats can also get stuck open causing the engine’s temperature to stay low.

Are both heater core hoses supposed to be hot?

Cabin heat comes from hot coolant, so drive long enough to warm up the engine. If coolant temperature is acceptable, feel both heater hoses, which should be hot.

Why is the heat in my car not very hot?

If the heater control valve is the culprit, the air coming into your vehicle won’t feel warm. The heater core may also leak coolant. The heater core is clogged from debris in the cooling system. If debris has caused a clog in the heater core, it will need to be replaced.

Can heater core hoses be put on backwards?

By reversing the hoses, the coolant will flow in reverse direction through the core, but it’ll still be flowing in the same direction as far as the engine is concerned. This may not prevent it from carrying debris from the core into the engine cooling system.

What temp should heater core hoses be?

Check the temperature of the heater inlet and outlet hoses by feel. (The air temperature around the hoses must be at least 85°F (24 °C).

Can you flush a clogged heater core?

A clogged heater core will prevent the coolant from passing through it, limiting the amount of heat that can be transferred. Flushing the heater core can remove these clogs, but if it fails to work, you may need to have your heater core replaced.

How do you check for a clogged heater core?

A good test to see if your heater core is clogged is to feel the hoses going into it in the firewall. Look at the firewall or bulkhead for two hoses close together. These are normally the feed and return hoses for the heater core. With the engine warm and running, feel the hoses.

How do you tell if your cooling system is clogged?

5 Signs That Tell You Your Radiator Is Clogged

1. Leaking coolant. When coolant is not able to circulate in the radiator, it can leak out onto other areas of the vehicle.
2. Discolored and thicker coolant.
3. Damaged water pump.
4. Excessively high gauge temperature readings.
5. Blocked, bent, or damaged radiator fins.

How much does it cost to fix a clogged heater core?

Replacing the heater core can be an expensive job, and usually costs between $564 – $927 for parts and labor. The parts aren’t particularly expensive, normally costing $80 – $234, but the location of the heater core means that labor costs tend to be quite high.