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 > Help with A/C freezing up ..

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ford truck guy

Pennsylvania

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Posted: 06/08/20 09:48am Link  |  Quote  |  Print  |  Notify Moderator

2chiefsRus wrote:

ford truck guy wrote:

bob213 wrote:

Fan not on high or auto? Freeze sensor dislodged from correct place?


Bro in law was not sure, sis in law THINKS it was on high, but not sure..

I will say this, I kept experiencing "LOW VOLTAGE" as my Progressive Industries shut me down 3 - 4 times due to low voltage... Could that have been the issue?


Does brother in law not have a Progressive unit to detect low voltage? Hope he didn't damage the air conditioner.


He does NOT have one....


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CavemanCharlie

Storden,MN

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Posted: 06/08/20 09:06pm Link  |  Quote  |  Print  |  Notify Moderator

ford truck guy wrote:

My brother in law swapped his 13.5 A/C last year for a brand new 15k A/C at a local RV repair. That place is now closed and he had an issue this past weekend..

We were camping in 90* weather Friday and Saturday with NO Issues... a front came through last night and took the humidity and heat away with temps in the 70*'s this AM.. He had cool air blowing, but it was not blowing hard... went up on the roof and his lines inside the shroud were all frozen...

He is 50 amp with 2 A/C's and was plugged into 30 amp service so was only using 1 AC..

Any ideas on what may be happening...


If the change in air temperature and humidity were quick then it's possible that it just couldn't keep up with the sudden change. Don't worry about it unless it happens to often.

It's hard for these systems to change quickly. Give it a chance. It may never happen again. Or, it may happen only in a situation where temps change quickly.

Shut it off, let it defrost, and try it again.

spoon059

Just north of D.C.

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Posted: 06/09/20 09:29am Link  |  Quote  |  Print  |  Notify Moderator

Could be a variety of options. Best case scenario is that the fan was on low. It doesn't move enough air to keep up with the humidity, the excess humidity freezes on the coil. Our AC is always on high, I don't even know why low is an option.

In regards to voltage, I'm not sure what low voltage would do in terms of allowing the coil to freeze. Just because YOU had low voltage doesn't mean that he did. I stayed at a beautiful state park a couple years ago that had 7 sites per run of electric. I kept getting low voltage and my EMS would disconnect power, my FIL at site 22 next to us never had a blip on his power and ran fine all weekend. The park ranger told us to avoid sites 7, 14, 21, 28 and 35, because they all had voltage problems in the summer when everyone's campers were pulling lots of amps for AC.

This is the type of problem that you wouldn't know by simply checking the power upon arrival. We were among the first people to get there. Plugged in and immediately turned on AC with no problem. It wasn't until around noon the next day that everyone's ACs kicked on at the same time to cool down. Plenty of voltage at the start of the run, not enough at the end of the run.


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Snomas

Sedona, AZ

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Posted: 06/11/20 04:01pm Link  |  Quote  |  Print  |  Notify Moderator

My front AC would freeze up if I had the temp set too low when it was 90* plus outside and if I had the temp set on 72-74 degrees. I was told by a HVAC repair man that I should run them at 78 or higher and they wouldn't freeze up. This was on my 02 Dutch Star with 2-13500 units. Later in life I changed them out to 15000 units and never had a freeze with temps set at 74 degrees and over 108 outside. My DW never wanted to use the DS in temps over 100 until I got the 15K units.
Not sure why this little TT I bought last year will do in hot climates w/ only one 13500 init


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poppa

Dallas, TX

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Posted: 06/11/20 07:29pm Link  |  Quote  |  Print  |  Notify Moderator

low voltage wont cause yur ac to freeze low airflow or low ambient with low set point will

time2roll

Southern California

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Posted: 06/11/20 07:34pm Link  |  Quote  |  Print  |  Notify Moderator

Snomas wrote:

My front AC would freeze up if I had the temp set too low when it was 90* plus outside and if I had the temp set on 72-74 degrees. I was told by a HVAC repair man that I should run them at 78 or higher and they wouldn't freeze up. This was on my 02 Dutch Star with 2-13500 units. Later in life I changed them out to 15000 units and never had a freeze with temps set at 74 degrees and over 108 outside. My DW never wanted to use the DS in temps over 100 until I got the 15K units.
Not sure why this little TT I bought last year will do in hot climates w/ only one 13500 init
I suspect the 15k replacements were better installed. Maybe even had the freeze sensors in the right spot.


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