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Indoor coil sensor

Ac failure to start

Posted by Anonymous on

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Posted on Jan 02, 2017

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SOURCE: Delonghi CP504AU Split Inverter AC system. When on

Hello I think it is a faulty defrost interlock or should at least bring on 1st stage electric heat during defrost mode.

Posted on Sep 14, 2010

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1 Answer

Carrier ac E4 error


If this is a ductless mini split e4 appears to be an air temp sensor on the indoor or outdoor unit that is sensing an abnormal reading. Check air filter and both I.d & o.d coil cleanliness. Its hard to troubleshoot without a model number. If its a 38g or 40g in the model number its a discharge temp sensor reading high temp situation (dirty o.d. coil, low freon, refrigerant restriction. Again, need a model #

May 29, 2015 | Carrier Heating & Cooling

Tip

Temperature in display changes rapidly. No cool


After completing service ensure that indoor room sensor and coil sensor placed in it's position.If misplaced temp reduces rapidly and again restarts to increase.<br />Room sensor placed in middle of left corner of indoor coil. Indoor coil sensor placed into copper tube brazed with indoor coil bend.<br />

on Jan 10, 2011 | Heating & Cooling

1 Answer

Have a Samsung split a/c .not working only indoor turn off isolater for 5mins turn back on wait a couple of mins turn on with remote a/c will start to work then goes out with red and green lights flashing...


this sounds like your AC is short on refrigerant or you have a defective sensor. When the AC condenser turns on feel the lines leaving with your hand. If it runs for a few minuites and does not get cold and sweats the gas pressure is low, if it does it could be one of your sensors in the evaporator.
There are usually two sensors/thermistors; take off the evaporator cover and one will be on the coil (room sensor) and the other inside a copper sleeve (coil sensor) You need a multimeter to check the ohmic value. your reading should be anywhere between 4K ohms to 10 K ohms, if your readings are in ohms (0-999) the sensor needs replacing with the original value, if values are mismatched the AC will not work

Feb 26, 2015 | Samsung Heating & Cooling

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I have a 2.5 ton ac outside. the indoor unit downstairs in the basement is a goodman. a new a coil was put in about a month ago. which is a goodman product. ive heard goodman is not a good product. a


the inside coil and outside unit should be matching in tonages another word if you have 2.5 ton outside the inside sould be the same. it don't matter what brand name or who made it.

Aug 04, 2012 | Goodman CKL36AR36 Air Conditioner

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E4 error on Yamatsu S-24H air conditioner ?


E4Fault indoor coil sensor (open or closed). Replace it.

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Its not working and flashing P6. Its a Mr Slim


dear sir/madam i think.... mr Slim A control R407c & R410a systems.
P6 = indoor coil frost protection in cooling or indoor coil overheat protection in heating.

Cooling
One of the 2 indoor coil sensors reads minus 15 deg C for 3 mins.
Heating
One of the indoor coil sensors reads over 70 deg C.

If you are sure the refrigerant charge is correct & system operation is correct then it could be a coil temperature sensor reading wrong temperature.
If you have one of those little monitor things which plug into the outdoor circuit board you can monitor the indoor coil temperature.
On later type remote controllers you can get all operating data like temp sensor data but you will need a service manual to do this.
Or you can measure the ohms resistance of the temp sensors & compare with the chart in the service manual. if you can do it by yourself do if not then contatct ot mitsubishi maintenance personnnel for furhter action, thank you hope answer the question please vote!

Sep 23, 2010 | Mitsubishi Mr. Slim MXZ30TN Air...

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Soleus KFR-18 Air Conditioner Problem


Check your thermostat settings at heat mode.

Jan 03, 2008 | Soleus KFR-18 Air Conditioner

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My ac unit


air conditioners freeze up for one of 2 reasons, #1 restricted air flow, is the filter, /orthe evaporator (cool) coil clean?
#2 it is low on freon, causing the coils to be colder than they should be.

Nov 13, 2007 | Heating & Cooling

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