H2oclass1
on the road (full Timers)
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My Dometic AC keeps freezing up. The freeze sensor reads 74° all the time, so I replaced the sensor. The new sensor never goes below 73°. I don’t think it would be low on freon or the freeze sensor would indicate that. Any ideas on what I should do next?
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wa8yxm
Davison Michigan (East of Flint)
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Joined: 07/04/2006
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Where is the freeze sensor located?
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times
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H2oclass1
on the road (full Timers)
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In the same place I took out the old one, in the condenser.
Or in this case in the ice. ![[emoticon]](http://www.coastresorts.com/sharedcontent/cfb/images/smile.gif "smile")
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Blacklane
New Carlisle, Ohio USA
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There are some trouble-shooting manuals on-line that may help you.
I assume the freeze sensor goes to a control board that controls the compressor, etc. The next step is probably to trouble-shoot or replace the control board.
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time2roll
Southern California
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I agree the control box is malfunctioning if the freeze sensor is buried in ice is interpreted as 74/73F.
2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
675w Solar pictures back up
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dougrainer
Carrolton, Texas
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1. There is NO freeze sensor in the condenser.
2. The Freeze sensor is mounted in the evaporator coil.
3. What Year Brand Model RV?
4. What Model AC and what TYPE wall tstat?
5. HOW are you reading the Freeze Thermister temp? Doug
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30sweeds
Iowa
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Compressor relay probably sticking or stuck due to the bad freeze sensor.
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H2oclass1
on the road (full Timers)
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Evaporator. My bad.
2015 Forest River Georgetown XL
AC Model B57915.711J0 with a EasyTouch RV thermostat
On the thermostat info screen, it shows the temp.
Some info I found in the manual:
Freeze Fault: Temperature of inside coil has dropped below 30°F (-1°C). The compressor will turn off and the fan will run until the inside coil sensor temperature reaches 54°F (12°C). The compressor will then run again if required. This fault can mean the air flow is restricted, filter is clogged, outside coils are dirty, refrigerant is low, humidity is very high, or the sensor is bad if becomes a recurring problem. • Freeze sensor: The control board will report three errors for the freeze sensor. BR = bad reading (out of range), OP = open sensor, MS = missing sensor. These letters will show in the freeze sensor temperature location in place of the temperature.
I am getting no errors.
To make it even more interesting. I have 2 AC’s, this morning with both off the temp is the same 63°. I’m still leaning towards replacing the circuit board but not sure.
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dougrainer
Carrolton, Texas
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1. That tstat is NOT a Dometic wall tstat. That is an aftermarket tstat.
2. You need to contac the Easy touch people for help. The freeze thermister WILL READ the evap and it will get below 60 degrees.
3. The AC only holds about 1 lb of coolant. So, if a leak, it will leak enough to NOT freeze or even cool.
4. Remove the sensor from the evap. Unplug one wire from the control board. IF the compressor comes ON, leave it that way. If not, jump the 2 wires together and leave and observe operation.
5. Have you actually seen the coils covered in ICE? Doug
PS, SWAP the wall stats and see if the problem follows.
Do BOTH AC units do this?
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H2oclass1
on the road (full Timers)
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Doug
I have seen the coils ice over.
I swapped the stats and the problem did not follow.
I only have the problem on 1 unit the other 1 is working fine.
Kenny
* This post was
edited 09/21/23 06:52pm by H2oclass1 *
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