2005 Montana heater blowing warm air only


Where is the heater core 2005 Pontiac Montana?

The heater core looks like a very small radiator, and functions just the same. It’s mounted under the dashboard, and it provides the heat needed for the blower motor to warm the cabin.

Why is there no heat coming out of my car vents?

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.

Why is my car heater only blowing out cold air?

Low Coolant Level

The coolant (usually a mixture of water and antifreeze) in your engine doesn’t just work to keep the engine from overheating: It’s also the source of heat supporting the heating system. If there isn’t enough coolant in your system, the heater core will blow cold air into your car.

Why is my heater not blowing out hot air?

Troubleshooting Furnaces Not Blowing Hot Air

Check batteries of your thermostat and replace the drained or faulty one. Check the fan settings on your thermostat if they are set to “auto” instead of “on”. Make sure someone else has not set your thermostat to a lower temperature.

Can a blown fuse cause heater not to work?

Faulty Wiring or Blown Fuses

Similar to your broken HVAC controls, your car’s wiring could be broken or have a short in it. This would mean the heater isn’t triggered when the driver commands it to function.

Why is my car heater blowing warm air?

Let’s break them down: Your thermostat may be stuck, which can prevent the heater system from warming up sufficiently. If your heater is blowing lukewarm air rather than cold air, this may be the culprit. Air bubbles may be trapped inside of the cooling system, which can cause malfunction.

Why is cold air coming out of my vents when the heat is on?

This issue could be caused by an improper thermostat setting. Check that the fan blower switch is set to “auto” and not “on.” When the “auto” setting is chosen, the fan will only run during a heating cycle and won’t push air that feels cooler through the vents in between cycles.