2013 Explorer AC oddities

[beau.young]

Hello all. I'm having a bit of an stumping issue to me on my AC. 2013 Explorer XLT 3.5NA. AC sometimes blows cool, most of the time not, front and rear. It also sometimes has a musty smell to it.

I have checked the low pressure, 35psi with clutch engaged. Clutch stays engaged, condenser is in good shape (clear of debris, no bent fins), refrigerant pressure is good. Cabin air filter just replaced a few months ago, checked again to ensure it was clean, all good.


Felt low and high pressure lines, high pressure line is definitely hot, but could not find a really cold spot in the low pressure line anywhere.

Also occasionally notice the fan speed decreases on WOT or heavy acceleration.

I checked the lines to the rear evaporator under driver rear of vehicle, and noticed around the connection (unsure of the technical name) that I could feel decently cool air blowing out under the car.

I'm in Tennessee, so the weather is anywhere from 70-95. What are your recommendations to check, test or probe?

 

[peterk9]

Just a guess but it might possibly be a sticking blend door or actuator issue. Not having used WOT or occasional heavy acceleration, I can't say why that fan speed may drop unless it is because there could be a power drop.

Peter

 

[beau.young]

Just a guess but it might possibly be a sticking blend door or actuator issue. Not having used WOT or occasional heavy acceleration, I can't say why that fan speed may drop unless it is because there could be a power drop.

Peter

I just replaced the blend door actuator that controls the dual temp zone from left and right a month or so ago to fix the passe get blowing heat while the driver blew cold. It just recently started. I've also noticed a hissing sound a few times with fan on low. It continued for about 30 seconds after a turned off completely.