Looking for true freezer defrost heat element for t-49f

Question edited for clarity.
Question moved from Televisions.

There is two sizes

https://www.partstown.com/true/gdm-49f/parts?searchwithin=capillary

Parts suppliers

https://www.google.com/search?q=True+GDM-49F-LD+parts

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Question edited for a lot more clarity.
Question moved to True Freezer category.

You need a refrigeration engineer. It sounds like is has a leak and needs topping up with refrigerant gas. Things that also need checking, circulation fan working and that the defrost timer and defrost heater, and electronic thermostat are working correctly. Refrigeration is not a handyman job.

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our freezer is set to defrost every 8 hours for 15 min. this seem to do the trick. we have a true t-49f reach in freezer. try this setting and see if it works for your situation.

Usually every 6 hours will keep the evaporator coil clear of frost. I set the time at 45 minutes per defrost. This unit has a defrost termination control that kicks it out of defrost when the coil reaches a certain temperature. The defrost timer is only a backup if the defrost control fails.

4 times in 24 hours for 40-45 minutes works fine.

They don't even ship them properly set. They expect that a trained technician is on site at start up. I generally use 4 defrosts in 24 hours at 30 - 45 minutes each. It depends on which timer is installed.

I would check your defrost timer to see if it is rotating. It may be stuck in defrost mode. you can check this by manually rotating the timer dial CCW yourself. This will be located in the front bottom left had corner behind the vent panel.

Try defrosting the unit by shutting it down until all ice is gone. If this corrects the problem and the ice returns you may either have a defrosting problem or a low freon charge.

in many cases, these units have relays or contactors where the contact points actually weld together. this causes the unit to stay running even though power to the coil has been stopped. I'd start looking there first. don't over look the possibility that someone could have mistakenly miswired the unit.

Your unit should have a defrost timer.The timer may be stuck in a defrost.It should be located at the bottom of the unit next to the compressor.Open the door to the timer and observe the position of the timer.If you turn the knob and the unit starts up,it's the timer. If this is the case, you can purchase a new one at any local a/c supply.Let me know,Mike