I NEED A DIAGRAM FOR DEFROST SWITCH ON T-72 F TRUE FREEZER

2 and 4 are power for the timer 1 and 3 are load lines N is defrost termination.

You have done good work here young man. There is a relay or switch that is keeping the signal for being processed. I had the same similar problem with mine. At least your compressor is ok. Are you sure timer is wired back right.

Possible defrost termination switch. It is mounted by the evaprator and has 3 leads coming off of it. Possibly red, brown and black.

Has the heater been replaced ? If so maybe wrong size heater was used.

most freezers have 2 controls. 1 is a defrost terminator and the other is a fan delay. the delay and the defrost terminator can sometimes be a "2 in 1" type switch. you would have to study the wiring diagram. The delay will not let the fans come on untill the evap reaches a preset temperature. take another look at the diagram. It may be that the evap is not getting cold enough. you may have a refrigeration issue.

The two stripped black wires connect to power.
Black tabbed wire to common.
Red tabbed wire to run.
White tabbed wire to start.
Looking at pins on compressor, read like a clock. Common clockwise to Start clockwise to Run

http://www.truemfg.com/index_en.aspx?language_id=1&event_id=401
Go to this web site. Be sure to have the serial and model numbers. You can request a wiring diagram from the tech line. This is most likely your best place to start. True uses a variety of different devices so I would do this first.
Let me know if I can be of more help after you get diagram.

I need A wire diagram for a freezer mo.49f

No i dont but i could suggest you check the heating element and the clixon that connects to the evaporator. If the heater does not function, it takes a much longer time than usual to switch the freezer on.

http://www.truemfg.com/pdf/InstallManuals/T-SERIES/t_series_english.pdf
Go to this web site and look in the manual on page 15. Check "Compressor runs but will not refrigerate". Gives some suggestions.
Now, inside the evap, usually strapped or clipped to the coil "U" turn on the end of the coil, is a Klixon device. This device comes in many different configurations. There may be 1 or 2 of these. One is a defrost termination switch. When evap gets hot enough so no frost is present, it terminates the defrost cycle. The other is a fan delay. It comes on when the coil temp gets to about 20 degrees. This prevents circulating warm air from defrost cycle. Now if there is only one device, it can be 2 in 1. That is, a defrost terminator/ fan delay. Will most likely have 3 wires going to it where as the 2 separate ones will only have 2 wires to each one. Now, either this fan delay is not working correctly or the coil is not getting cold enough. When it gets cold enough, it turns on the evap fans. This is most likely where your problem lays. Check it out.