refrigeration relays

Types of Refrigeration Relays

What is a Refrigeration Relays ?



Air Conditioner (AC) (Refrigeration Relays)

How AC Relays ( refrigeration relays ) works- Think of air conditioning relays (refrigeration relays) as traffic signals for the electricity flowing through your AC system. When you want your AC system to start, for instance, the air conditioning relay for your compressor opens a circuit and allows current to flow through that component. When it’s time for the compressor to stop running, the relay cuts off power to the compressor by closing the circuit.

What Happens When Refrigeration Relays Fail

Relays can also overheat, especially if too much electricity flows through the relay due to a problem with another AC component.

Bad air conditioning relays can come with their own set of symptoms. As a result, you might run into one or more of the following issues:

  • AC compressor does not start
  • Poor or non-existent cooling
  • Excessive heat from relay
  • Burnt or acrid odors
  • Rattling noise from relay


Relay Trouble? Call the Experts

Replacing an air conditioning relay isn’t a DIY job, in most cases. You’ll need a seasoned expert who can quickly and properly diagnose your AC issue. Our Air Conditioning repair specialists can take care of your relay problems and put your AC system back to work.

Types of AC relays:

PTC Relay:refrigeration relay PTC (positive temperature coefficient) relay, also known as the start relay. The PTC relay starts the compressor inside the fridge to make cold air so your food stays cool.




Box Type Relay: A relay is a switch that controls the flow of electricity to your air conditioner, allowing you to turn the air conditioner motor on and off, providing you with cold air when you need it.refrigeration relay



Refrigerator Relays (Refrigeration Relays)

How refrigerator relay works?
In a refrigeration system, the compressor relay serves as a safety device that prevents the compressor from overheating or sustaining damage from electrical surges. When the compressor starts to draw too much current, the relay will open and interrupt the electrical circuit, preventing damage to the compressor motor.

Types of Refrigerator/Refrigeration Relays & OLP:

          RelaysPTC Relay: If your refrigerator stops producing cold air, there may be something wrong with the PTC (positive temperature coefficient) relay, also known as the start relay(refrigeration relay). The PTC relay starts the compressor inside the fridge to make cold air so your food stays cool.






OLP(Overload Protection)(refrigeration relay): The overload relay (refrigeration relay) is a protection device used in the compressor circuit on your refrigerator. Power is applied to the compressor motor windings through the overload device, and the relay is used to add the start winding in the circuit until the compressor is at running speed.




Coil Types Relays : Relay consists of a coil, which receives an electric signal and converts it to a mechanical action and contacts that open and close the electric circuit

What is the function of the coil in refrigeration relays ?Relays
The purpose of the coil is to achieve resonance, which occurs when the primary coil passes current into the secondary coil. When electricity passes through a circuit, it flows through a resistor and into an electric coil. An electric coil works to maintain stability and resists the flow of current, initially.

Water Cooler Relay and Deep Freezer Relay ( Refrigeration Relays )


Refrigeration Relays

  1. Water Cooler Relay:
    • In a water cooler or water dispenser, a relay is used to control the compressor, which cools the water. When the temperature inside the water cooler rises above a certain set point, the relay activates the compressor to cool the water.
    • The relay is a switch that is controlled by an electrical signal. When the signal is sent to the relay, it closes the circuit, allowing electrical current to flow to the compressor, which then starts cooling the water.
    • The relay is an essential part of maintaining the temperature of the water at the desired level, ensuring that it is always cold and refreshing.
  2. Deep Freezer Relay:
    • In a deep freezer or chest freezer, a relay is used to control the compressor responsible for maintaining low temperatures within the freezer. This is crucial for preserving frozen foods for extended periods.
    • Similar to the water cooler relay, the deep freezer relay is a switch that is activated by an electrical signal. When the temperature inside the freezer rises above a specific set point, the relay engages the compressor to begin cooling and maintaining the desired low temperature.
    • The deep freezer relay is essential for preventing the freezer from thawing, which could lead to the spoilage of frozen foods.


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