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Aircond works on cool but not heat. Defrost light on but a/c not frosted up.

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"defrost" is a function of a HEAT PUMP, not the same as an air conditioner because it uses the compressor to both heat and cool. It is not unusual for the defrost control to fail which would allow the cooling to work but not the heat cycle. A qualified service tech should be able to diagnose the fault within the diagnostic phase of a service call and recommend corrective action.

Posted on May 03, 2008

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Posted on Jan 02, 2017

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Hotpoint Future fridge freezer - freezer working well but top of the back of the fridge has a large build up of ice ??? And doesn't appear to be keeping the food cold enough


here are lots of things that can cause cooling problems. One of the most common causes of poor cooling in a frost free refrigerator is a defrost system failure. In such a case one or the other compartment may appear to be keeping proper temperature but that too may change in a short period of time. The fridge compartment's temperature rise is usually (but not always) the first to be noticed. Frost" and "Ice"
There is a difference between "frost" (a white, snow-like substance) and "ice" (usually clear and solid). When referring to what is seen during an inspection, please keep this distinction in mind as the possible causes for each are often very different. The Defrost System
Inspecting the (usually rear) wall of the freezer compartment for a frost build up is necessary. (In the case of many GE top freezer models, check the freezer's bottom panel.) If there is a frost coating on it, it is often a sign of excessive frosting beneath it. Sometimes however the evaporator cover panel will actually need to be removed (see the illustration below) before an excessive frost build will visible.
The refrigeration system's evaporator (cooling) coil is usually in the freezer compartment. This evaporator will periodically frost over and have to be defrosted by means of a heating system. When the defrost heating system fails, the frost can accumulate to such a degree that airflow throughout the appliance is hampered. There may be just enough air circulation to cool the freezer section but that will eventually stop too.

Sep 28, 2016 | Hotpoint Refrigerators

1 Answer

My refrigerator/ freezer doesn't seem to be too cool. Cleaned bottom coils and left unplugged for 24 hrs. Turned back on and it worked fine for a week. Now it is not cooling again. Any ideas why?


Hello Chris Conrad,

Worked fine for a week... is actually a pretty good sign...
MOST likely means the cooling is OK...

FROST-FREE (defrost)... should become your focus

TYPICALLY... (assuming you have that type of UNIT).

after the week... is it clogged with frost / ice (cool in the freezer area but not the refrigerator... (a week is a little less than average to become non-functional in the refrigerator (cheap little refrigerator thermometers come in really handy here... (but still cool in the freezer area where all the REAL cooling is done))).

Can you see frost/ice blocking any air slots in the FREEZER AREA??

Is water being put in the (I assume) "defrost pan" daily...?

Easy to check... put a strip of typing paper folded over the edge of the (water tray) defrost pan...

Still clean, straight & dry tomorrow = defrost circuit failure
(again.... assuming it is a "frost-free").

Yes (clean & straight) means I am wrong: paper
will look rumpled & ugly (possibly wet).

Then...

You have a HUGE AIR INTRUSION problem you need to fix first... (door alignments, gaskets, etc.) then get sophisticated about makes, model numbers... & how soon it takes to get ICE-BOUND.

You can comment me back... or get out the original
refrigerator documents... (typically) looking for:
- Defrost timer or control board
- Defrost thermostat
- Defrost HEATING ELEMENT

OR

Search on line to parts/spares + appliance+ (your model number).

Good luck...

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Apr 27, 2016 | Refrigerators

1 Answer

My refrigerator is cool but not cold. My freezer is keeping things frozen but takes longer to form ice (no ice maker) and my ice cream is soft. I hear the motor running and I do not have any frost build...


Hi Nancy,

I bet you've got all kinds of frost / ice behind the plastic cover that protects (and shields from view) the cooling coil in the freezer compartment.

You probably have one or more: defrost timer, defrost terminator or defrost heating element that has failed. Call for service - or empty the fridge and unplug with door open for a day - ice will melt and when you plug in again it will work just fine. Until frost builds up again that is.

Good luck!

May 12, 2015 | Frost Refrigerators

1 Answer

Refrigerator stopped cooling. As close as I can tell the fan in the freezer part was frosted up for a length of time and has possibly ruined the fridges cooling fan? Kenmore model 106 freezer on top.


If the fan in the freezer stops, then coll air from freezer will not pass from freezer section to fridge section.In that case, the freezer section will get over frosted but fridge section will not get cold, because cool air will not pass from freezer to fridge.The fan is there for two things, 1) for cooling the heating evaporator coil and 2) For flowing the cool air from freezer to fridge.---------- If the frost is getting collected and fan is getting stuck up in frost, then this is the problem.The defrost cycle is not running, the cooling cycle is running.---------------
This problem is called defrost problem.-------------

So first thing you try is , perform, manual defrost reset procedure.---------

The manual defrost reset procedure is as follows : ----
First unplug the unit from main power outlet. Then empty whole unit completely. Then keep both the doors open. Wait for 24 hours. All the ice collected on the coils and in the freezer section will get melted. Clean the water from the sections. Then Connect the power cord of the unit to main power outlet after 24 hours/.Then set the temperature to normal in both fridge and freezer section. Then check,if same frost is getting collected, then its defrost problem,. If it's again building up ice that means the unit is not defrosting. It's starting the cooling procedure, and then while defrosting, it's not working. The defrost assembly consists of three main parts. The defrost thermostat, the defrost heater and defrost board. Any of the one is not functioning. When thermostat sense the maximum cooling, it triggers the defrost heater to start heating and this defrosts the ice collected on the coils and the system works. Both thermostat and heater are controlled by defrost board. First the thermostat and defrost heater to be checked, if both check ok by meter and visually, then its defrost board causing the problem. You can get required parts from from online sites like: --- www.repairclinic.com or from searspartsdirect online site. --------- This should help.Thanks.Helpmech.

Sep 18, 2011 | Kenmore Refrigerators

1 Answer

I have a aircond / heat pump unit. When in the heating mode it run for about10-15 minutes and you hear a small bang and here a rush of pressure in the aircond lines and the the unit seem to be running in...


Hello,Your heat pump is in DEFROST mode and this is normal(only during a call for heat).When in defrost mode the supply air temp should still be warm as 1st stage electric heat strip comes on during the cycle.If the unit did not defrost every once in a while the outside unit would look like a snowman after a while.The reversing valve is the "bang" when it changes over.

Oct 27, 2010 | Coleman Heating & Cooling

1 Answer

Hi, Our refrigerator has stopped cooling and I desperately need to try to fix it myself. Lights still come on. Fan or something is still running but the freezer still works so I thought maybe that's what...


There is likely a problem with the defrost circuit or cold air circulating fan (but could be a low freon charge or other problem). The freezer compartment has the cooling coil with defrost heater and a fan that pulls cold air from the freezer and blows it into the fresh food compartment; based on the setting of the thermostat in the fresh food compartment.

When the defrost heater fails, the area that the cooling coil is located in eventually turns into a solid block of frost and ice. It becomes impossible for air to be drawn across the cold coil, cooled and blown into the fresh food compartment. The result is a rising temperature in the fresh food compartment - and eventually in the freezer section, too. Since the fresh food compartment contains the thermostat and the temperature never gets low enough to satisfy it - the compressor runs non-stop. That is, until the defrost timer kicks in to shut it off for 20 minutes or so.

The first thing to do is to manually defrost the freezer by accessing the cooling coil after emptying the contents of the freezer. This can be a pain in the neck to remove racks, shelves, ice maker, etc. to get to the back wall of the freezer, behind which the cooling coil is found. If you expose the cooling coil and it is encased in frost and ice it is a problem with the defrost circuit. If it is not - the fan is suspect. If the fan spins, check for a blocked path between the fan and the fresh food compartment. Defrost by placing a heat source in the freezer or directing the output of a blow dryer at the coil. If you're unable to access the cooling coil, you can simply empty the freezer and defrost it with a heat source. it will take longer to melt all the frost and ice, but it will work.

If it is a defrost circuit problem, you'll need to check voltages and continuity on the defrost terminator & timer and defrost heating element, fans, etc. after completely thawing the ice & frost.

This job isn't a good first time DIY job due to the danger of freezing skin, etc. due to possible exposure to freon in the system and the tight spaces you'll be working in with live voltages. You might want to call a pro after you've defrosted or put up another fixya request if you decide to dig in on your own and need specific help with procedures, locating parts, wiring diagrams, etc.

I hope this was a good starting point to help you decide whether to go forward or not on your own. Good luck!

Oct 07, 2010 | Kenmore Refrigerators

1 Answer

Fridge not cool enough but frosty at the back


Since you are getting frost in you frost free refrigerator, tell me that the defrost circuit has a problem. It is made of a defrost timer/module, defrost heater and defrost thermostat. What should happen is that the defrost timer should periodically turn off the compressor for about 30 minutes and turn power to the defrost heater via the thermostat. The heater is attached to the evaporator coil and melts any frost build up on those coils.

It sounds like the defrost circuit has not been working for a while because the ice build up is not allowing the air to circulate around the coils to cool the refrigerator. The typical failures to the defrost circuit are the defrost timer motor fails to advance, or the defrost heater burns out. Hope this helps you.

Jul 14, 2010 | Kenmore 64802 Top Freezer Refrigerator

1 Answer

The refrigerator side has stopped cooling.


, you might have a defrost problem. Frost free models have a heating element that is controlled by a timer to automatically defrost ice, defrost timer turns on defrost heating element every 12 hours to melt ice in freezer and allow good air flow.
You can test defrost element with an ohm meter(located inside freezer coils-will have two wires going to a plug connection), if OK replace defrost timer (located in various places depending on make and model

Aug 18, 2009 | Refrigerators

1 Answer

GE Profile - fridge not cooling


If freezer is icing up, you might have a defrost problem. Frost free models have a heating element that is controlled by a timer to automatically defrost ice, defrost timer turns on defrost heating element every 12 hours to melt ice in freezer and allow good air flow.
You can test defrost element with an ohm meter(located inside freezer coils-will have two wires going to a plug connection), if OK replace defrost timer (located in various places depending on make and model

Aug 17, 2009 | Refrigerators

1 Answer

Freezer not working


If freezer is icing up, you might have a defrost problem. Frost free models have a heating element that is controlled by a timer to automatically defrost ice, defrost timer turns on defrost heating element every 12 hours to melt ice in freezer and allow good air flow.
You can test defrost element with an ohm meter(located inside freezer coils-will have two wires going to a plug connection), if OK replace defrost timer (located in various places depending on make and model

Aug 17, 2009 | Viking Professional VCBB363 Bottom Freezer...

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