Heater blowing cold air?

2015 VOLKSWAGEN JETTA
101,235 MILES • 2WD • AUTOMATIC
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ATBESTMINE
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A couple weeks back, the heater would only blow hot air while the car set the idle. But now only cold air blows through the system. I've checked all the fuses; I've had the coolant system flushed. Replaced the coolant. But since I know nothing about cars, and I don't want to continue guessing through search engines the problem and solution I am reaching now reaching out to anybody that can help.
Oct 28, 2022 at 12:54 PM
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STRAILER
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Sure, when the engine is cold check the coolant level if okay when the engine is warm place your hand on the heater hose, if they are warm is sounds like you have a mode blend door actuator that is going out. Here is a guide that can help with the location of the actuator in the images below so you can change it out:

https://www.2carpros.com/articles/car-heater-not-working

Check out the images (below). Please let us know what happens.
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Oct 29, 2022 at 12:17 PM