It started a couple months ago while on an out of town trip. First we started having problems with the A/C temp. It has front/rear, left/right climate controls, if that helps. It started blowing warm air through every vent in the van & making a strange screeching sound in the front of the van every few seconds. The whole vehicle slowed down & drop a couple hundred RPMs each time it made the screech sound. Now, it only did this when the rear system was turned on. If I turned the rear A/C off the noise & RPM drop stopped & it would start blowing cold air again. If I turn the rear A/C back on, it blows hot air through ALL the vents, both front & rear & the sound & RPM drop comes right back.
Ok... a couple weeks later, the blower fan started intermittently working. Even when it blows air it will randomly start switching back & forth between cold & very hot air. Now, sometimes the fan doesn't always come on at all or takes a couple minutes to start blowing. A few days ago, while parked in my driveway, there was a loud thump under the floor of the van when the air kicked on & it felt like a hammer hit the floor board. I'm at a loss as to where to start. I've had it to two garages & all they want to do is add freon & send me on my way.
Ok... a couple weeks later, the blower fan started intermittently working. Even when it blows air it will randomly start switching back & forth between cold & very hot air. Now, sometimes the fan doesn't always come on at all or takes a couple minutes to start blowing. A few days ago, while parked in my driveway, there was a loud thump under the floor of the van when the air kicked on & it felt like a hammer hit the floor board. I'm at a loss as to where to start. I've had it to two garages & all they want to do is add freon & send me on my way.