prichardson
Lafayette, La
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Joined: 10/31/2006
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If you are getting icing you likely have an an airflow problem. Is evap. coil clean? Filter clean? Duct work clear and ALL registers open? Ceiling assembly installed and sealed correctly?
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dougrainer
Carrolton, Texas
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Joined: 06/11/2007
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prichardson wrote:If you are getting icing you likely have an an airflow problem. Is evap. coil clean? Filter clean? Duct work clear and ALL registers open? Ceiling assembly installed and sealed correctly?
IF you have a functioning freeze sensor system, you WILL NEVER get ice regardless of conditions. Doug
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dougrainer
Carrolton, Texas
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H2oclass1 wrote: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
You need to contac the Tstat maker. I have NEVER---NEVER had a AC control board malfunction for a freeze sensor. It is ALWAYS the freeze sensor malfunction. Try swapping the good sensor from the other AC unit.
Is your control board in a 6 by 6 galvanized box? If so, I would swap the control units. Very easy to swap. Since I never work on systems that have modified parts(your after market tstat system), you really need to contac Easy air. With Dometic Control and tstat, I have NEVER had a problem like yours. The aftermarket tstat system makes troubleshooting much harder. Doug
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dougrainer
Carrolton, Texas
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Since I have no knowledge of the Easy tstat, I looked it up. ANY Dometic wall tstat NEVER had the capability of reading the freeze sensor temp. I checked all the Dometic Easy air replacements and NONE had a spot for Freeze sensor capability. So, You need to really call easy air and get help. Doug
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H2oclass1
on the road (full Timers)
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Joined: 09/20/2023
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The EasyTouch RV 351 thermostat does read the freeze sensor. They call it Inside Coil Sensor. In there manual it says "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)."
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dougrainer
Carrolton, Texas
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H2oclass1 wrote:The EasyTouch RV 351 thermostat does read the freeze sensor. They call it Inside Coil Sensor. In there manual it says "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)."
That is what the THEIR manual states. BUT, since YOUR system is malfunctioning, I still state YOUR Tstat is the fault, NOT the Dometic controls. The original Dometic CT Tstat DOES NOT have Freeze sense capability, to sense or display Freeze sensor. It only has 3 wire control and all communication must come thru the 2 wires of the three. Now, are you POSITIVE the "Coil Temp sensor is NOT the condensor sensor for a Dometic HP? The Dometic HP DOES have an external condensor coil sensor for freeze up in HP mode. THAT sensor may be your problem and not the freeze sensor for the COOL mode evap. This sensor if defective WILL cause lack of compressor operation. THIS is why I tell you to call Easy Air. WHY will you not call easy air? Doug
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wa8yxm
Davison Michigan (East of Flint)
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Joined: 07/04/2006
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Ok some nits and observations
1L when the OP typed "Condenser" yes he made a mistake. For he also said "IN THE ICE" and there should never be ice on the condenser save perhaps in late january here in the great white north (And you won't care at that point you will be using the FURNACE)
Next The thermostat... NOT even a suspect. The T-Stat if wall mounted has absolutely NOTHIGN to do with the freeze sensor.. They don't even talk to each other.. They do both talk to the control board but differnet ears (Ports).
I do not know how the O/P is reading the frost sensor.. I'm not aware of any A/C control system that has a way to do that.. So I'm now asking. How are you reading the sensor?
A Multi-Meter can measure the resistance.. now the problem here is most Thermistor deices are Negative Temperature coefficient Devices.
This means as the heat goes up the resistance goes down (Standard resistors like the filiment in an incasdascant lamp as they heat up the resistance goes up.. Special carbon units and others used in electronics may be deisigned to NOT do this)
But not all Thermisistors are the same value.. If you are using the Temperature setting on a multi meter with a Thermistor other than one designed for that meter.. you may get wrong readings.
Read the device in a room that's 72 and then stick it in the freezer and read it see if the resistance or the indicated temp on the meter changes.
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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The EasyTouch RV 351 thermostat has an information screen. It displays "Inside Coil Sensor:73F".
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time2roll
Southern California
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Joined: 03/21/2005
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H2oclass1 wrote: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 Do both read the same temperature in each position when swapped?
One was working, right?
2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
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H2oclass1
on the road (full Timers)
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My problem is in the living room. The one in the bedroom works fine. I swapped the two stat and the problem is still in the living room. Therefore I'm certain the thermostat is not the problem.
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