Question about Coldtech 21 cu. ft. / 595 liter Commercial Freezer J2SFF-21B

1 Answer

Evaporator freezes up

Freezes up every 3 to 5 days. am able to manually defrost

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 291 Answers
Re: evaporator freezes up

No model # .. Im assumeing its frost free.. so that means a defost problem.. heaters, defrost themostate or timmer.

Posted on Sep 02, 2007

Add Your Answer

0 characters

Uploading: 0%


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


3 Points

Related Questions:

1 Answer

Why mu refrigerator rrtg21pabb ia working but not freeze

If the refrigerator is not defrosting, the defrost control board might be defective. The defrost control board monitors several conditions and determines how often to run the defrost cycle. If the board fails, the refrigerator will not go into the defrost cycle. Eventually, ice will build up on the evaporator coil and then the refrigerator and or freezer will not stay cold enough. This will depend on where the evaporator is located. It's prudent to check the defrost heater and defrost thermostat for continuity before replacing the defrost control board.

Aug 27, 2014 | Haier RRTG21PABB 20.7 cu ft Two Door...

1 Answer

Top 3 shelves don't freeze

Cold air sinks. If evaporator temp is not low enough only the items on bottom of freezer will get cold and possibly freeze - stuff on top will not.
Throw a digital thermometer in there towards the top shelves and I bet your temps are high. Low refrigerant will cause this; furthermore, if you leave the refrigerator door open by accident, the refrigerator will never shut off, the freezer evaporator will freeze over with a block of ice, and the freezer temps will be higher. If that is what happened, simply unplug the unit and allow it to self defrost and then turn it back on for proper operation and make sure that the refrigerator door is properly closed!

Nov 20, 2013 | Whirlpool Freezers

1 Answer

When the defrost comes on it is on to long the temp gets above freezing I need to make the defrost cycle shorter

Does it? Or is it just the display that reads 50? Don't forget the evaporator has to get to 50f to get rid of the ice forming on it. It will do this 3 or 4 times a day, but the product temperature should not creep much above setpoint. Check the food temperature with a digital probe when defrost occurs to see if it is only the display module ( which may have it's sensing phial too close to the evaporator or have lost it's insulation jacket)
Also check the grill in the base (condenser) is clear and clean so it recovers from defrost as it should..

May 17, 2012 | True 49 cu. ft. / 1388 liter Commercial...

1 Answer

Fan on freezer won't com on but freezes food on

Hi and welcome to FixYa, I am Kelly.
There are 12 midelos that fall under the model number you passed. I will cite EV171NYMQ05 as a reference model number via this link:

The freezer fan should be on anytime the compressor is on. If there is an ice block built up on the evaporator coils it can lock the fan blade in place via the ice build up. Additionally... if the fan motor bearings are dry or coated with sludge this too can prevent the fan motor from operating. The fan motor is item 3 this link:

Detail views:

To check the can motor all that is required is a simple continuity check across the 2 connector wires. You should read under 480 ohms.

If you discover that the fan blades are encased in ice... do a manual defrost: (be ready to tend to a water mess)
1. By first unplugging the unit and then removing the freezer contents.
2. Direct an external fan into the freezer compartment for just over 2 hours.
3. Make sure the compartement drain funnel is clear of obstructions. Item 11 this link:

After the 2 hour manual defrost period plug in the unit and test to see if the fan motor is running.
If it is running you may have an automatic defrost problem causing the ice build up. On a freezer the ice build up will start again if there is an automatic defrost problem in 3 - 5 days. Until the automatic defrost problem is corrected you will end up doing the manual defrost routine described above everytime you have improper cooling problems.

Components that can cause the automatic defrosting problems are
1. The defrost timer item 7 this link: Because it is not cycling or stuck in one position.
2. The defrost bi-metal thermostat item 9 above link (stuck closed)
3. The defrost heating element item 5 above link. (open)
And of course internal wiring....

Check the fan motor for continuity... if you attempt to lubricate it which is very difficult on this fan motor make sure you use paraffin based "Turbine oil" and not a regular household or automotive oil. Using any other oil will cause the fan to stop working in as little as 30 days.
Thanks for choosing FixYa,

Jul 08, 2011 | Whirlpool 16.7 cu. ft. Upright Freezer...

2 Answers

Freeezer is only freezing around 26 degrees

Dirty condenser, condenser fan motor is not running, freezer overpacked, bad thermostat, evaporator ice build up and it blocks the air flow. evaporator fan motor is not running or sealed system problem.

Mar 14, 2010 | Freezers

1 Answer

Maytag RSW2700 Freezer cold Refrigrator Warm

Check for excessive frost build up in the freezer on the back panel. This would indicate that you have a defrost problem. One of 3 things cause a ref not to defrost. Defrost timer may not be advancing to the defrost position on the timer...The defrost thermostat, located on the evaporator in the freezer, measures open (bad)...or you have a bad defrost heater. If you have an electronic defrost control,which is used on most Maytag, Jenair, or Amana units, this could be your problem. If you turn the unit off for 24 hours to let it defrost manually then it will last for about 2 weeks before freeze up again.

Apr 11, 2009 | Maytag Freezers

1 Answer

Loud bang

What you are hearing is popping caused by thermal expansion inside the evaporator enclosure during its' defrost cycle.
Depending on your make and model, it'll go into defrost every 8 to 12 hours of compressor "run time". That is, the defrost timer "monitors" how long the compressor runs and after it accumulates the pre-set "run time", the timer then shuts the compressor off and initiates its' programmed defrost routine. This routine lasts for 20-30 minutes, or until the defrost thermostat opens.
The defrost routine sends 120 volts to a heating element in the evaporator compartment which gets red hot. This sudden temperature change (from below freezing to warm) causes the cabinet to expand slightly. That's when you hear the "Pop".

I hope this helps, John. Thanks for using FixYa, and don't forget to rate my answer.


Apr 02, 2009 | Freezers

1 Answer

Very thick ice collects in bottom of freezer

the drain pipe you cleaned out has a p-trap that holds water. after awhile this trap will build up sludge and possibly freeze up. i recomend defrosting the drain pan again and try some way to forcfully flush hot water thru the drain. I use a turkey baster filled with water to do this. if the drain continues to freeze you may need to install a heat trap to keep drain from freezing.
a heat trap is just a piece of 10-12 guage solid copper wire with about 3 inches in the drain and the other end wrapped around the defrost heater which is the BLACK rod attached to the bottom of the evaporator coil in the freezer compartment. if you need any further assistance just let me know Peyton

Jan 27, 2009 | Bosch Freezers

2 Answers

Freezer freezing up

If its a frost free upright freezer and the evaporator is frosting up with a snow like frost you have a defrost problem.. defrost themostate, heaters, or timmmer

Sep 16, 2007 | Freezers

Not finding what you are looking for?
Coldtech 21 cu. ft. / 595 liter Commercial Freezer J2SFF-21B Logo

Related Topics:

188 people viewed this question

Ask a Question

Usually answered in minutes!

Top Coldtech Freezers Experts


Level 3 Expert

56925 Answers

mike cooper

Level 3 Expert

864 Answers

Brad Brown

Level 3 Expert

13362 Answers

Are you a Coldtech Freezer Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides