My heat is not working and making a ticking noise? 2007 Ford Explorer?

My heat is not working and making a ticking noise? 2007 Ford Explorer?

My ac works fine. When I change it to heat, it does not get hot, but air still blows out and there's a ticking noise coming from somewhere behind the dash. What is wrong?

I googled it and found a few forums that said it was the "blend door actuator" or the "air blend actuator"… Does that sound plausible? And if yes, is that something that could be fixed by a person with some mediocre mechanical skills? LOL.

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