HVACR: How To Install/Replace A Refrigerator Thermostat (Temperature Controller Installation) Wiring

HVACR (Heating, Ventilation, Air Conditioning/Refrigeration) How To Replace A Refrigerator Thermostat/How To Install A Refrigeration Thermostat Temperature Controller/ How To Check A Commercial Refrigeration Thermostat With A Multimeter (How To Check Voltage/Resistance For Refrigeration Applications) Refrigerator Troubleshooting Guide/Penn by Johnson Temperature Controllers Refrigerator/Freezer Thermostat/Penn A19 Series Temperature Control A19ABA-40C/PENN A421 Refrigerator Thermostat/How To Check Penn Refrigeration Thermostat/How To Check Johnson Controls Temperature Control/PENN A19//Remote Bulb Temperature Control/Refrigeration Line Voltage Mechanical Thermostat Test/How To Check A Refrigerator Mechanical Thermostat With A Multimeter/How To Install A Refrigerator Thermostat/Step By Step/Training
Thermostats are typically found inside the refrigerator and have a knob that allows users to adjust the temperature setting. Once a user sets the desired temperature, the thermostat maintains that temperature by controlling the flow of electricity to the compressor. If the thermostat is the brain, the compressor is the heart of the operation, responsible for pumping the refrigerant through the coils.
When the air inside the refrigerator is at the desired temperature, the thermostat stops the flow of electricity to the compressor. When the thermostat senses too much heat, it allows electricity to flow, activating the compressor.
In most commercial refrigerators, the thermostat has a capillary tube filled with gas. As the temperature in the fridge increases, the gas expands and pushes on a diaphragm, which operates a set of contacts which in turn operates the compressor.
Johnson Controls A19 Series temperature controls are designed to cover a broad range of uses for heating and general purpose requirements. Controls have SPST contacts which open on temperature increase or they may be supplied in single-pole, double-throw contact action. Various control ranges are available to cover working temperatures from -30 to 550° F (-34 to 288° C). Closed tank fittings and bulb wells are available for immersion applications. These controls are designed for open low and open high applications. Where critical or high value products are to be maintained within a specific temperature differential, a single control should not be applied to function as both an open low and open high control. In these applications, a separate backup control with alarm contacts should be wired to indicate when the back-up control operates.

[@PeterTang1]

what were the signs that you needed a new thermostat? thank you for the video!

[@RefrigerationDevil]

Sir good job I’m starting in the career of refrigeration and commercial equipment from residential hvac I can tell I’m gonna learn a lot from you 🙏🏽

[@izzybell11]

Excellent vid with hand on experience ! Interesting and helpful video.

[@JumpermanTech]

Thank you! Nothing like hands on experience. Appreciate the comment 🙏
Stay tuned for new videos every week⚡🔧

[@marcusdorn6704]

Should the thermostat sensor be in front or back sensing return air

[@jasonwright8529]

how do you covert this mechanical thermostat to a Ranco ETC thermostat 115V circuit? I understand how to power the ETC and jump power to the contacts below... but not sure what I do with the existing wires from the mechanical thermostat.. please help I have to convert to mechanical thermostats tomorrow to ranco ETCs.

[@Eddy63]

Nice replacement ... Thx for posting ...

[@JumpermanTech]

Thank you Eddy! Appreciate the feedback 🙏
Stay tuned for new videos every week⚡🔧

[@thesilentonevictor]

I have seen installation of them on the evaporator causing these to lose calibration if it's digital np Great job

[@JumpermanTech]

What do you mean exactly? Which one loses calibration being installed? The mechanical one or digital one? Thanks for watching dude 🙏 Always appreciate your support

[@thesilentonevictor]

@@JumpermanTech the mechanical ones

[@migueldominguez4311]

Hello teacher !
How did you set up the clock inside of the thermostat and how did we know or diagnostics the thermostat was not good at all thanks

[@jackyehya5039]

What would happen if you rewired those 2 connectors incorrectly by placing them in the opposite terminals (accidently)? Would it damage the thermostat?

[@enriquemontenegro5222]

Love your vids! How did you know to replace the thermostat?

[@GoalsOverExcuses]

How much you charge for this bro?

[@Chewie123]

Why didn't you mention the diff setting lever?

[@marvinpinder5756]

Need more vidieos like that

[@JumpermanTech]

You got it🤙 Thanks for watching & stay tuned for new videos every week! 🔧⚡️

[@nicolerennie]

great video, super🌟🌟🌟

[@chesstime356]

Why not the Sensor is by the door half way down?

[@juliochavezunacosa4147]

return air is a good position

[@JumpermanTech]

Hey Mohammad, Julio is correct. The sensor should be at the return air section of the blower for the best accuracy👌

[@JumpermanTech]

@@juliochavezunacosa4147 👌👌👌

[@shine-cg9uf]

💪🇺🇸👍

[@JumpermanTech]

Thank you brother! Always appreciate your support 🙏🔧⚡🇺🇲✌

[@juliochavezunacosa4147]

It is better electronic controls than mechanics A421 , and less expensives

[@JumpermanTech]

I was recommended the A421 by another tech as well. They are less expensive than these? This mechanical stat was on sale back when I got it and kept it in the truck for stock. Came in handy 💯 Thanks for watching! Appreciate the response. Stay tuned for new videos every week⚡🔧