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avfordguy · 06-13-2019, 07:38 PM

Quote:

Originally Posted by 2Amy

Thank you AV Ford guy.
Heater fan replaced and all works good now. We will see for how long.

However I have another question similar to my the heater question.

Traveling now and weather turned up warm. My AC now turns itself off for about 30 seconds to 2 minutes and then back on for a while. It does it sporadically.

Wen it was new it did the same thing Ford said that it had to much refrigerant in it. So they took it all out and added proper amount. (Going by work order)

Now I am not mechanically smart on the AC. Any ideas?

2 thinks that can cause ac to not cool for 2 to 3 min then start to cool, 1 suction accumulator switch that screws in behind the battery, 2 there is some debris in the system, and the "fixed orfice screen" is plugged up, the E350 450 does not use an expansion valve.

avfordguy · 06-13-2019, 07:39 PM

Quote:

Originally Posted by 2Amy

Thank you AV Ford guy.
Heater fan replaced and all works good now. We will see for how long.

However I have another question similar to my the heater question.

Traveling now and weather turned up warm. My AC now turns itself off for about 30 seconds to 2 minutes and then back on for a while. It does it sporadically.

Wen it was new it did the same thing Ford said that it had to much refrigerant in it. So they took it all out and added proper amount. (Going by work order)

Now I am not mechanically smart on the AC. Any ideas?

Do you mean it stops cooling and blower still runs or does the blower quit???

WorldCat25 · 06-14-2019, 07:15 AM

Quote:

Originally Posted by avfordguy

Do you mean it stops cooling and blower still runs or does the blower quit???

In my case (not the OP), the blower motor quits. Will cycle on for a few seconds and shut off. Will cycle for 5-10 miutes, depending on how hot it is in the car. Evidently it will come on and stay on.

Thanks for the help.

2Amy · 06-15-2019, 10:18 PM

Quote:

Originally Posted by avfordguy

Do you mean it stops cooling and blower still runs or does the blower quit???

AV Ford Guy. When I say the air cuts off from anywhere from 30 secs to 2 minutes. That's what it does. No air flow what so ever. Even when you turn it to vent. Its like shutting it off.

Actually that's what the heater was doing.

Skiddy · 06-15-2019, 10:28 PM

Quote:

Originally Posted by 2Amy

AV Ford Guy. When I say the air cuts off from anywhere from 30 secs to 2 minutes. That's what it does. No air flow what so ever. Even when you turn it to vent. Its like shutting it off.

Actually that's what the heater was doing.

sounds like it could be the blend door operation. I have a 12 expedition and have heard that the blend door operation were famous for going out. might google it and come up with something

avfordguy · 06-15-2019, 11:14 PM

Quote:

Originally Posted by 2Amy

AV Ford Guy. When I say the air cuts off from anywhere from 30 secs to 2 minutes. That's what it does. No air flow what so ever. Even when you turn it to vent. Its like shutting it off.

Actually that's what the heater was doing.

No it's not the blend door,they usually stick in one position, now if you loose air flow going up a hill that is different, that's a loss of vacuum to the system , blower quits, is pure electrical, 3 things in the circuit, dash switch(known for failure) resistor block, or blower motor, OR the air cooling tube for the blower is not seated 100% of the way or its plugged,not allowing cooling to the blower motor, if it is a loss of vacuum then when climbing hills it blows air out the defroster vents (safety default)

2Amy · 06-17-2019, 01:39 PM

Quote:

Originally Posted by avfordguy

No it's not the blend door,they usually stick in one position, now if you loose air flow going up a hill that is different, that's a loss of vacuum to the system , blower quits, is pure electrical, 3 things in the circuit, dash switch(known for failure) resistor block, or blower motor, OR the air cooling tube for the blower is not seated 100% of the way or its plugged,not allowing cooling to the blower motor, if it is a loss of vacuum then when climbing hills it blows air out the defroster vents (safety default)

Okay, I understand. I think .When climbing I can see it happening as a safety default. However what about on straight roads? (no hills) City driving? If it was electrical, What does anyone look for?

Okay double that.

avfordguy · 06-17-2019, 11:49 PM

Easy test, run engine at idle in your driveway, a/c on high cool, if everything is good you should have good airflow out of the dash vents, now leave all ac controls the same, and turn engine off, then the key back to run without starting the engine,air should blow out of dash vents for at least 3 minutes, if it goes to defrost by itself, you have a vacuum leak.

2Amy · 06-20-2019, 12:31 PM

Quote:

Originally Posted by avfordguy

Easy test, run engine at idle in your driveway, a/c on high cool, if everything is good you should have good airflow out of the dash vents, now leave all ac controls the same, and turn engine off, then the key back to run without starting the engine,air should blow out of dash vents for at least 3 minutes, if it goes to defrost by itself, you have a vacuum leak.

AV Fordguy; Thank you, You have been a big help

Okay, My next step would be to try your paragraph. I will let you know what happens.

2Amy · 06-25-2019, 03:57 PM

Quote:

Originally Posted by 2Amy

AV Fordguy; Thank you, You have been a big help

Okay, My next step would be to try your paragraph. I will let you know what happens.

AV Fordguy.

I have not tried anything yet on the AC. I had bigger issues that arose. I was dodging a big tire piece on the road, which I did but the piece just happened to hit my hydraulic fitting on my jacks. I( would bet I couldn't do that if I tried too.) So I have been playing with that. I knew a guy that worked on hydraulic lifts for a living and he walked me through what I needed to do.

However where I'm parked it just doesn't want to stop raining. I've gone through a few disposable bunny suits.

Anyways looking at the forum their seems to be another person with an AC issue who could use a smart person like yourself.

avfordguy · 06-25-2019, 04:15 PM

Quote:

Originally Posted by 2Amy

Okay, I understand. I think .When climbing I can see it happening as a safety default. However what about on straight roads? (no hills) City driving? If it was electrical, What does anyone look for?

Okay double that.

When on flat level groundmy v10 class c at 14,000 lbs only makes about 9 to 10 Inches of mercury ( vacuum), any leak in the vacuum system will default to defrost,once the accumulator tank runs out of vacuum

midasman · 06-26-2019, 09:37 AM

Yep! I just got back from the Ford dealer with the same problem with my AC. I thought, at first, it was freezing up, but it turns out the the under dash doors were defaulting to defrost periodically BECAUSE the electric controller module under the dash is FAILING...Needs to be replaced. They should cover it under warranty because you have ALREADY complained about this problem...Good luck!