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Master built 2 door freezer model BLG-48HD serial 016254 still in warry. How do you tell how long defrost and time it goes into defrost? Also box won't pull down to temp, high alarm goes off. temp 25 in the box low side 8 psi high side 225 psi.

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Most units are on a timed defrost that occurs at different times so finding the exact time will be hard but defrost times are about 30 minutes. from the pressures you posted I'm thinking that the condenser fan is not running or the condenser itself is plugged up with dust. (i'm not very familiar with r404 but for most other refrigerants the hi side pressure is really hi). if its still in warranty you would be better off to call your service company after your sure the condenser itself is clean to prevent a charge for impproper maintanence. thanks peyton

Posted on Mar 06, 2009

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Upright freezer door was left ajar. The alarm keeps sounding, can you tell me where the reset button is located.


Hello Deena;

My name is Peter. I am a retired field service refrigeration technician.

There is no reset for the alarm. The alarm goes off when you are not maintaining temperature.

During the time the door was ajar, warm air got into the freezer either icing up and locking the cooling fan or forming a block of ice on the cooling coils (Restricting cooling air flow.)

The best thing you can do, unless you want a $300.00 plus service call to defrost everything, is to turn power off to the freezer. Open the freezer door. Have plenty of old towels to soak up the water in the bottom of the freezer as it defrost.

You did not provide a model number which is located on the inside wall of the freezer. Every 8-10 hours your freezer will completely shout down for 20-30 minutes where only the light works and the defrost heater turns on. The ice build up is too much for the defrost heater to handle.

In some freezers the defrost mode is in the control board, in others it is a separate component that you can repeat trip using a flat head screw drive.

Jan 26, 2016 | Freezers

1 Answer

Have 2 door masterbilt freezer model BLG40HD serial LQ400110. need to know what year manufactured


http://www.master-bilt.com/comdir/direct.htm
go to this site. It has info that you can contact them and just give them your model and serial and they can tell you. It's just that easy.
Hope it helps.

May 29, 2010 | Freezers

1 Answer

Where are the defrost timer and defrost thermostat located on the Delfield commercial reach in freezer, model number F1FR?


depending on the age it might be built into the board if it dont have a board the timer might be close to the compressor

Apr 29, 2010 | Delfield Freezer ColdPro Solid Door...

1 Answer

Whirlpool AFB126/H/AL Freezer - Defrosting & Refrosting


Hi. I am Kelly and welcome to FixYa. Here is the real question..... Is the food staying frozen?

Freezers usually defrost 3 times a day (8 hr intervals) Some as often as 4 times a day. The freezer use concept is that it is not opened more than 3 times a day. (Yes there will be more times than that any given week)

Having said all of that.... some things to look at.

1. Check the door seal for any signs of tears... grease... collapse...

2. Make sure there are no gaps in the door or between the closed door and the seal.

3. Many people don't check this one... but make sure it is level. An un-level freezer can cause the door seal not to function correctly.

Now if your saying that the food is actually defrosting... then there are a few other things that can cause that.

A. Sticking / defective Defrost timer

B. Defrost element is not heating and the freezer goes through a VERY long defrost cycle as the contents have to reach 60 Deg F for the 60 Deg bi-metal thermostat to close and advance the defrost timer to start the compressor.

C. Intermittent operation of the 60 Deg thermostat

I hope this clears things up a bit for you.

Thanks for using FixYa.

Kelly

Feb 10, 2010 | Freezers

1 Answer

How do you remove the doors on the master built 3 door Freezer with serial #51688


http://www.master-bilt.com/litform.html
Try this web site as it has manuals for their equipment with pictures. I've used it in the past with some pretty good results.

Hope this helps.

Feb 05, 2010 | Freezers

5 Answers

I have a True Freezer Model T-49. It works fine but every 3 or 4


This sounds like a stuck relay to me. I have seen this problem before. The defrost clock kills power to the compressor relay coil during defrost. If the contacts in the relay are welded together the compressor runs while unit is trying to defrost. On newer units this relay is mounted in base of unit on the side or back of the electrical box near center bottom of unit. The compressor relay is a small rectangular box with 4 wires attached. It can be replaced with a single pole 20 amp contactor with a 120 volt coil/ or 240 volt. Check the units name plate voltage rating and ratings on old relay! ;)

Mar 14, 2009 | True 49 cu. ft. / 1388 liter Commercial...

1 Answer

Freezer only freezing to 20 degrez


If the door was left ajar for any extended period frost has built up on the cooling coils. A complete defrost of the freezer should take care of the problem. Normally a frost free system will clear the ice from the cooling coil when the defrost time cycle happens. However frost may have built up in areas where the heaters can not readily remove it in a normal defrost cycle and shutting the unit down with the door open for about 24 hours should clear it out.

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1 Answer

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First, call Restaurant Parts and More (1-888-814-1110) and ask for Rick. He can help either get you the seal or have one custom made. I've used him for 15 years with great success. If you have model and serial, it would be even greater.
He can do the same for the heaters that go around the door frame.

Don't understand which "Line" you are referring to. In alot of cases, the drain on the drain pan is clogged. This causes water to overflow onto the floor. The drain can be clogged from trash getting into it. Most of the time, the drain heater is either not working or not ever installed. Water refreezes in drain line and causes the overflowing problem.
If this does not help, let me know. Clear up the "Line "question and maybe I can go alittle deeper into this.

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1 Answer

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Check the time setting on the defrost timer. It may not be set to the correct number of minutes for defrost. Compare it with the side that is working properly for the right time of the cycle.

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