Question about Heating & Cooling

1 Answer

My fujitsu compressor keeps freezing up and going into defrost....even after the defrost cycle ends the coils still have frost on them. once the outside temperature is about 35 the unit works great.

The unit is new- has been check by techs and everything appears to be fine

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 30 Answers

Please info on exact conditions...cooling, heating, what other techs did, etc. the more the best!!

Posted on Nov 15, 2014

Testimonial: "this happens in the heating mode- it is a 3/4ton unit, fujitsu halycson with a total of 4 indoor units....two floor units, two wall 37000 btu total the said air was I the lines and over charged- removed refrig, pressure checked and added refrig to specification. the compressor still frosts over at temps below 34,defrosts numerous times. techs said fujitsu advised possible over bend in copper line in a floor unit the system works great at temps above 36"

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

InMrFixIt
  • 121 Answers

SOURCE: Duo Therm AC not working

If unit was freezing up the air flow would normally stop, until the unit is turned off and allowed to thaw. I suspect evaporator blower may have a worn out belt, or compressor is shutting off due to control or internal overheat. What is the age of the unit?

Posted on Aug 07, 2008

  • 52 Answers

SOURCE: Fujitsu ASU12C1 is freezing up

unit is freezing up because it either has too much freon or not enough. the pressure should be checked on both the low and high sides and corrected.

Posted on Jun 18, 2009

co7196
  • 3433 Answers

SOURCE: Indoor unit temperature between 60F & 70F after R22 charge..

If anything, it appears undercharged. Purging is not recommended. @90 degrees the high side corresponding pressure is 168.4 and Low side coresponding numbers re70psi/68degrees. With all due respect to the tech I think . If your room temp is 80, the corresponding high aide pressure is 143.6 , Low side 85 psi Yup, undercharged. Now do me a favor and don't start any "but he said" wars going. If anything, Just call him back and tell him something is still not right. Ask him to bring you a pocket rergerence for temp/pressure relationships. The numbers I gave you are for R-22 which is commonly used in residential applications. Well, good luck and keep your cool. IDon't purge. R-22 is very expensive asis everything else. You may want to dispute anny additional service call charges. Good Luck

Posted on Aug 22, 2009

co7196
  • 3433 Answers

SOURCE: Indoor unit coil air temperature 60F - 70F after R22 charge..

With ambient air temperature@ 65 with R12 Pressure should be 63.8 psi
Discharge air should be approximately 10 to 20 dgrees cooler than ambient. @ 70 degrees ambient the pressure70.2 -R-12. It is unlawful to discharge freon into the atmosphere. a 2500.00 reward is good incentive for someone reporting such release. Call the tech back and have him correct it. Good luck, Ned If he blows it into the air. A 2500.00 picture will help train him in compliance and overfilling a system. Good Luck.

Posted on Sep 29, 2009

  • 1214 Answers

SOURCE: Defrost cycles needlessly for extended time period

Without knowing what the problem was with the old board, you're not going to be able to figure much out, I don't think.

Did you check that temperature sensor I mentioned? You will have to pull the top off to get access to it. Normally found connected to one of the tubes for the coil, silver in color, with 2 wires connected to it, near the bottom of the base of the unit.


Posted on Dec 13, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

All systems clean and running, but freezer too warm and unit runs continuously


what does the frost pattern look like on the evaporator? Is top of the compressor too hot to keep your hand there?
APPLIANCE 911

May 28, 2016 | Frigidaire Refrigerators

1 Answer

Hss25gfpd freezer not freezing


when you had the back wall off how did the evaporator coil look?was the frost pattern even all over the coil or just on the top or bottom,if it didn't have an even frost pattern covering the whole coil you have a freon leak and will have to replace the machine.it will just keep getting warmer

Jul 08, 2012 | Hotpoint HSS25GFP Side by Side...

2 Answers

Freezer side works fine but the fridge side seems to be getting warmer even with temp dial set all the way cold. No warm air flow from bottom. is condenser bad?


you hae an issue with the defrost cycle in behind the panel in the freezer how the defrost system works Here is what's happening when you have a malfunction in the defrost system.
  • Air cannot circulate from the freezer(where the cold happens basically) to the fresh food section.
  • Your refrigerator will run constantly to try to cool the fresh food section. This will develop a new set of problems with your refrigerator. More on that later....
  • Excess frost builds up within the coils inside the freezer. This is what is blocking the air flow to the fresh food section
  • Usually you will notice the icemaker will stop making ice. Poor air flow and not quite cold enough temperatures in the freezer cause this
  • Water will not come through the dispenser on the door. Cold air settles, the water resovoir will freeze.
  • Compressor may overheat and shut off. This is when you hear, click, click, click. Not good
  • Ice Cream in the Freezer will start to get soft. That's really not that bad. lol
What can you do about this. Let me explain the defrost system in general so you get an understanding of what is going on.
The coils inside the freezer are the only part inside the whole refrigerator that "get cold". They need to stay free from excess frost build up so that air can pass through the coils and reach the refrigerator section of your refrigerator. Every eight hours or so, depending on the type of defrost timer or control you have, the compressor and fans will shut off and the machine will go into defrost mode.When the refrigerator is in defrost there is a heater that is tied into the evaporator coils inside the freezer that comes on. This heater is behind the rear panel inside the freezer where the evaporator coils are located. It melts the frost that has accumulated over the course of time. After about thirty minutes the machine comes out of defrost and goes back to normal operation.
Now the air can continue to pass through the coils and keep the freezer frozen and the refrigerator cool the defrost cycle is made up of 4 functioning parts the defrost timer, the defrost heater, the defrost thermostat and the fan .I will go through what each of these do
The Defrost timer Some refrigerators have a defrost timer. This type works like a clock. Every eight hours or so the machine hits the defrost spot and that's when defrost occurs Some refrigerators have an Adaptive Defrost Control. This is what makes a refrigerator energy efficient. It varys the length of time it takes the machine to go into defrost.So instead of energy hogging heater coming on every 8 hrs it could be different due to how many times you open the doors and how many times the compressor has run some models dont have a defrost timer and instead use a control board that works just like the timer it is usually located in the rear of the machine under a metal panel.
Defrost Thermostat
This is the component that controls how long the heater stays on when the machine is in defrost mode. Say the defrost cycle is thirty minutes, the heater may only be on for ten of those thirty minutes on the timer controls. On Adaptive Defrost Controls, when the heater shuts off, shortly after the machine exits defrost mode. Basically if the heater only stays on for ten minutes, the whole defrost cycle will only be about 12 or 13 minutes long.
Basically when the heater comes on, it starts to melt the frost on the evaporator. Once all the ice and frost is gone, the temperature behind the panel will start to rise. Once the temperature behind the panel rises to a certain temperature, the thermostat will break the current of electricity going to the heater. Bam, it shuts off and prevents your freezer from becoming a sauna, or an oven. I'm sure you get the drift. The heater is on the bottom of the evaporator coils and the defrost thermostat sits on top of the evaporator coils.
Defrost Heater
This one should be pretty simple. By now if you have read this far you should already know what this does and how important is it. Some defrost heaters are a coil of wire in a glass tube under the evaporator coils. Works like a light bulb basically. The other style looks like the bake element in your stove. They both get red hot either way and melt the frost.
The Fan
Some dont consider this to be part of the defrost cycle but if the fan is not working then the air is trapped inside the freezer and sometimes can cause the same ice up situation which is why I say to always look at the fan first
Continuity tests can be done to check the defrost thermostat and the defrost heater you can also do an ohms test between terminal 1 and 3 on your defrost timer which will tell if the motor section of the timer is good then you can check between terminals 1 and 4 to by doing a continiuity test which is to the compressor and tells the compressor how long to run if you turn the timer till you hear the click it goes into position to and you can do a continuity test on the heater between terminals 1 and 2 and then you can do a continuty test on these two terminals as well And here is the guide to how your defrost cycle works if you have any further questions message me back and please remember to rank how this opinion has helped it allows me to help others in similar situations Thanks Rick

Feb 01, 2011 | Jenn-Air Refrigerators

1 Answer

I have a GE GSS20IEM side by side. It is not


The possibilitty is the 8 hour timer may be defective. This timerr is the one which cut off the compressor and powers the heater to defrost the coooling coils to condense the water to the try below. If this wont happen then the possibility of the cooling coils building up frost will decrease cooling. The thermostat can also be a culprit as the thermostat is also in circuit . You can see if the timer works in this cycle by shutting off the fridge for several hours and restarting to check the defrosting cycle.the timer is placed near to the compressor unit and the heater near the cooling coils. Hope you check this out. Good day .

Jul 26, 2010 | GE GSS20IEM Side by Side Refrigerator

1 Answer

Coils freeze up, replaced thermostat, defrost unit, mother board, only marginally works when set on 2-3


It is normal for the coils to frost evenly all over but if it's not defrosted it will build up preventing proper cooling. After replacing your defrost components make sure the frost is being melted. The motherboard determines when to defrost based you your use of the freezer/fridge. It should defrost from once a day to once every two or three days.
Is the fan in the freezer running? It won't cool right without it. It should run when the compressor runs.
Are the coils frosting evenly? Uneven frost means it is low on freon and requires a tech to repair.
Is the fan underneath the fridge near the compressor running when the compressor runs. If not It won't cool properly.
Does the compressor ever cut off as it should when it reaches the selected temp.

Jan 20, 2010 | GE (PSS26MSRSS) Side by Side Refrigerator

1 Answer

1999 Frigidaire Refrigerator


Check rear wall of freezer by feel for frost. Heavy, even frost indicates likely problem in the defrost system. Unplug unit. Defrost heater (in freezer behind rear wall panel), defrost thermostat (same area-must be checked at freezer temperature) or Defrost timer-located lower back outside of unit. Near compressor. Do continuity test on heater and defrost thermostat and if they show continuity (good), replace defrost timer. If not, replace the one that tests bad.

Defrost coils fully. Reassemble.

Please let me know if I have helped with comments and rating.

Refrigerator will work about 7-10 days after being defrosted until thick frost builds up again cutting off air flow to both compartments

Sep 07, 2009 | Frigidaire Freezer 20.3 Cu. Ft. Frost Free...

1 Answer

Our 4 year old GE side by side frig suddenly warmed to 64 degrees. Freezer stopped freezing and is at 43. Motor is running.


Really need to know what motor(s) are running (compressor, evap fan inside freezer compartment, condenser fan under fridge)?? Of course, check your temperature (thermostat) settings. Side-by-sides usually have 2 of them. They should be labled for refridgerator and freezer. The freezer control usually only opens a baffle from the freezer compartment to the refridge compartment. The refrigerator temp control is the one that controls the compressor on-off cycles and the temp of refrig compartment (this keeps the refrig compartment from freezing the milk and cokes) If the freezer control/baffle is set too far open, this will cause the refrig temp control to shut off too soon for the freezer temp to get low enough. These controls can get bumped out of the correct setting accidently from time to time.
To check the following, the fridge has to be running, or in a condition where it "should be" running: If compressor is running (condenser fan should be too), check if evaporator fan (inside freezer) is running. Open (freezer) door and hold door light switch in when you check evaporator fan operation (some fans stop when door is open) If it is not running you may have a bad evaporator fan motor. It could also be a bad defrost timer, causing the evaporator (also inside back of freezer) to ice-up. This blocks the air flow over evap. Also, there is a defrost terminator switch on the evaporator coil that stops the defrost cycle when coil is clear of ice/frost (but timer hasn't ended defrost cycle). If it is defective, that could also keep the fridge from going into the defrost cycle, or taking it out too soon. If it is the timer, change the defrost terminator as well. Depending on how handy you are, you may be able to check/change any of these parts yourself. If you don't know much about elecrical stuff, you should leave it to a repair tech. Hope this helps.

Jun 25, 2009 | GE Refrigerators

2 Answers

Coil is freezing on freezer


Yes, the seal will let outside air into the unit causing the coil to ice up. When it ices up the air cannot blow through the fins in the coil, thus no cold air goes to the refrigerator section.

Dec 20, 2008 | Whirlpool GB2SHKRLS Stainless Steel Bottom...

2 Answers

Kenmore frost free refrigerator


Hi thanks for te question .If all the coils are frosted. no its not going into the defrost cycle. and you also have a problem with a clogged drain thanks the appliance doc

Sep 18, 2008 | Kenmore 18.3 cu. ft. Top Freezer...

1 Answer

Freezer/refrigerator compressor running constantly


th ebi-metal is a thermostat which shuts the defrost heater on/off, but doesnt actually put the unit into defrost. if it were bad the defrost heater would never go on resulting in massive build up of ice on back wall of freezer, and noticable refrigeration sect. cooling.. dont know how you know the compressor never shuts down, but if that the case perhaps you have a sealed system/ freon issue. try removing the back panel of freezer section and check the evaporator coil. you shuld have an even frost pattern over the entire evap coil. if theres just frost over the top 1or 2 coils, and the rest of coil is shiny aluminum , thats an indication of a sealed system issue.( 5 year part warr by manufacture) def not a do it yourself issue...but that would,, depending on extent of restriction/loss of freon,, cause freezer to freeze and defrost eratically,and the compressor would be running constantly trying to achieve a good stable temp

Apr 02, 2008 | Refrigerators

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

48 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

paulcarew

Level 3 Expert

2458 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Donni Steen

Level 3 Expert

659 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...