Heater is blowing cold air

Hello,

This could be a problem with your heater core. Your vehicle's heater core is like a little radiator that sits in a box , usually called the Heating Air conditioning Ventilation Control (HVAC) Module. The HVAC Module has ducts coming out of it going to the vents in your vehicle's dash. As hot coolant circulates through the heater core a temperature door, controlled by the temp knob on your dashboard, either allows heat out or holds heat in the HVAC Module. When your heater core fails, there will be no heat to come out of the HVAC Module and usually you will notice that your floorboard will be wet or damp.
I have included a few links down below for you to go to:

https://www.2carpros.com/articles/how-a-car-heater-works
https://www.2carpros.com/articles/car-heater-not-working
https://www.2carpros.com/articles/replace-heater-core

Please go through these guides and let us know what you find out.

Thanks,
Alex
2CarPros

Check the temperature of the hoses going into the heater core. They should be too hot to hold onto for more than a couple of seconds. If they are hot, you are having an issue with the air distribution in the plenum. If they are cold, try to bleed the cooling system with an air lift, these can be purchased through amazon or many discount tool vendors for less than $50. This system will pull all of the air out of the cooling system so that coolant can fill every void thus making it air pocket free.