My husband replaced the evaporator drain tube heater a couple days ago. Since it's been back up and running, the temperature is holding at 0 degrees but the compressor never seems to stop running. He turned the dial down to 5 and it did shut off, but after about 20-30 seconds the compressor kicked on again. Could he have caused another problem by replacing the drain tube heater? Another thing he noticed is that the fan shuts off when the door is open and restarts when it's closed. I don't recall if this happened before or no, but he says no. The drain tube heater was bad for a couple years, to the point where we had to pull the hose and let the water drip into a bucket or it would just ruin everything in the back of the freezer and we'd end up with a giant iceberg. It's been three days and the new one seems to be doing what it's supposed to. He's convinced that he messed the freezer up by replacing the drain tube heater himself. I didn't think the drain tube heater would make the compressor keep running, but I don't know anything about freezers. Any help would be appreciated. Our ice cream parlor opens a week from today and we're not sure what to do. Thanks!
Have him check the t'stat. And freon lines. I believe the t'stat is the problem. Are the door gaskets ok and does it seal properly when closed. The fan should always run, so this could be in the rewiring. I am assuming you will be working out of a freezer where the working temp is a little higher.
Thank you for your quick response. This freezer is basically for storage if toppings, frostings and tons of ice cream that are about to go into our dipping cabinet. Before the drain tube heater was replaced it never went below 10-12 degrees so I was happy that it was holding at 0.
Everything I've read says it might be the thermostat, but we're not sure how to check that to see if it's bad.
Oh, and the door sea to be sealing properly. Thanks again!
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SOURCE: Freezer Not Fan not running!
Most all commercial freezers have some sort of fan delay/ defrost termination device. Commonly called a "Klixon" (pronounced clicks-on). It is a device that is attached to the evap. It's function is to terminate the defrost cycle when the evap reaches a certain temp, say about 50 degrees or so, to ensure there is no build up of frost/ ice on the evap. It then allows the compressor to run, and cool the evap down to a reasonable temp., say about 20 degrees, and then let the evap fan come on. It prevents overloading the compressor during a high temp condition, and it also prevents circulating warm air left from the defrost cycle. I believe this device is most likely your problem. With no air circulating, the box will no cool down.. I have seen them burn and/or slhort internally. They can come apart. too. I would look here for that problem. the True manufacturing website does not give alot of info on this piece of equipment, such as a wiring diagram but manuals are available.
Check this out and let me know how it comes out.
SOURCE: TUC-48F undercounter -10 freezer, door heaters not heating
http://www.truemfg.com/catalog/servlet/com.apsiva.servlet.HomeServlet
Go to this True web site. It has spec sheets and manuals. Hope this helps you
SOURCE: Freezer begun tripping our 20 amp breaker for some reason
ok hi there i viewed the specs for this freezer
http://www.truemfg.com/catalog/servlet/com.apsiva.servlet.HomeServlet
this unit must be plugged into a 120v outlet with a 15amp circuit breaker dedicated (nothing else should on this circuit) so all by itself. you have to check the voltage outlet where you plug in. you must have at least 115v or better (125v the most) if you have less then 115v it will cause damage. ok you went and checked all this out and everything is 15amp with 115v or better and it still trips breaker.
ok the running amps is 6.8 amps so to blow the circuit you need 15 amp which is too high.
i suggest you call a refrigeration guy because he will be able to determine if the problem is the compressor (which has a 4 year warranty with truemfg.com only in the USA) or something else. Usually but not 100% what would make a freezer like yours to blow the fuse is the compressor. if it overheats it will do this, if there is a sudden high pressure within the system it will do it, if you have a condenser fan that is not running at proper speed it will do this...
the problem cannot be pin pointed understand please... you have to babysit it, watch for changes in the refrigeration system and the running compressor amps, voltage drops ( this will cause high amps) etc...
Refrigeration is not easy and alot of tech stay away... so those who stick it out make money cause you have 2 choices: buy another one and pay big bucks to get it fixed. at least see if you can find someone to come over (for like $40 - $60) and tell you exactly whats wrong with it... whew... hope this was helpful and not confusing...sorry
SOURCE: freezer is short cycling ,thermostat
To me it sounds like, from what I am reading that your compressor may be the root cause if it is short cycling and you changed the thermostat and moved the thermocouple and the problem persists. Was this working fine till recently or did you just aquire the freezer and noticed it is not performing correctly? Basically, using a digital ohmmeter, you pull the compressor's relay and overload off its three terminals, then check the resistance between each of these three pins. Older relays looked a bit different than the solid state ones, but pull off pretty much the same way. First note the two pins that read the highest resistance. The one that remains is the 'common', to which one end of both the start and main windings connect. (The common's not always the top pin, so you'll want to do this test to be sure) If those two sets of readings aren't within about 1/2 ohm of each other, then one of the compressor windings is shorted, and if it runs at all, it'll run hot and usually end up short-cycling on its overload protector. If the windings test OK, but it still won't run, then I connect a test cord and try to run it manually. If I can't start it that way, it's most likely a mechanical problem, most often binding bearings, and the 'bottom line's the same: either the compressor or freezer will have to be replaced. Did the new thermostat come with an adjustment screw in the back? if so you might want to play with that as that can also cause this issue if it is not set correctly.
Here's the simple procedure I use whenever I run into one that's 'short-cycling' (trying to start, clicking on/off every few seconds, or in some cases, every minute or two).
Reading from that common to each of the other two, carefully note each reading. Then measure back across the two with the highest resistance, ignoring the common. That reading should be the exact total of the two individual coil readings, because you're reading through both coils in series now.
SOURCE: My true t49-f double door
Many times a refrigerator's defrost timer will go out keeping the compressor from running
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what you can do to check it is to turn the tstat slowly and see if it clicks. this will tell you if it is mechanically workin. I really believe you need to replace it however. The tstat controls whether the compressor comes on or not. When the desired temp is reached then it is supposed to turn it off. zero degrees is cold, but if the compressor is always running then it would get colder. I would start at the tstat first then check the evaporator next to see if it is functioning right. At least it is keeping the product cold. The compressor is at least doing that, but you dont want to wear it out.
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