2012 Ford Focus Loud Popping
I have a 2012 Ford Focus SE. Every morning when I go to school, I turn my
car on and turn the heat on at the front windshield defroster setting. When I
get to school 7 minutes later, I turn the heat off and experience a loud
popping sound every ~.5 seconds. It sounds like it is coming from the lower
dash or control area where I turn the heat on and off. When I turn the heat
back on, the popping noise stops. As soon as I turn the blower off again, a
loud popping ensues. When I turn the car off the popping continues for
another 5 seconds and then halts completely. The popping also occurs
sporadically, it doesn't make the noise every day. What seems to be the
problem and how can it be fixed?
A door that lets in air to be cooled or heated from the outside has lost its spring or vacuum.
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