The retrofit problem

Modern inverter boards output PWM.
Conventional compressors need a clean ON/OFF command.
Generic relay fixes often cause false cycling, humidity failures, and callbacks. TonSwitch eliminates that conflict with filtering + hysteresis and a field-ready build.

You don’t need “a relay.” You need a PWM interface designed for technicians.

Common relay fixes fail on PWM - here’s why TonSwitch succeeds

Generic relay boards were not built for PWM control logic or compressor environments.

They often fail due to false cycling, humidity, vibration, and messy wiring — causing callbacks and lost time.

TonSwitch eliminates the PWM conflict

  1. PWM in — from the refrigerator control board
  2. Signal processing — TonSwitch interprets and filters the signal
  3. ON/OFF out — clean, stable control output (relay-style)

No software. No configuration. No experimenting. It just works — consistently.

Installed cleanly — built for real service work

TonSwitch is designed for technician installs: compact footprint, clear wiring, and stable ON/OFF behavior from PWM — without trial-and-error.

Why Tonswitch

  • Hysteresis + filtering

    Clean ON/OFF behavior that prevents false cycling.

  • Fully encapsulated (potted)

    Built to resist humidity, condensation, and corrosion.

  • Field-ready build

    Anti-vibration design for stable operation near compressors.

  • Documentation + support

    Faster installs, fewer mistakes, real help when needed.

Why TonSwitch outperforms generic relay boards

Feature
TonSwitch
Generic relay
PWM compatibility
✔
✘
No false relay cycling
✔
✘
Anti-vibration design
✔
✘
Moisture-resistant
✔
✘
Integrated input cable
✔
✘
Field-tested installations
✔
✘
Technical support & documentation
✔
✘
}

Real demo: clean ON/OFF from PWM

Installation & Technical details

Installation

Estimated time: 5–10 minutes (technician-level)

No software, no setup. Compact format for tight spaces.

Steps:

  1. Identify the PWM control signal line (per documentation)
  2. Connect PWM IN to TonSwitch
  3. Connect ON/OFF OUT to your control relay/command path
  4. Verify stable cycling under normal operation

Safety note: This is a professional control interface. Follow standard electrical safety practices.

Technical specifications

Input: PWM control signal

Supply: 12V DC

Output: Relay-style ON/OFF control (N.O / COM)

Intended use: Control signals only (not for switching high-power loads directly)

Isolation: Relay-based

Encapsulation: Fully potted

Environment: Professional indoor equipment / service installs

Warnings & Professional Use Notice

Professional use only

TonSwitch is designed for use by qualified refrigeration and appliance repair technicians.

Not a consumer product

This module is not intended for consumer DIY projects or household end-user installation.

Installation responsibility

The installer is responsible for verifying wiring, polarity, and compatibility before applying power.

Environmental conditions

TonSwitch is fully potted and designed to withstand typical refrigeration environments, including humidity and vibration.

It should not be exposed to conditions beyond its intended operating limits.

Protection

When interfacing with sensitive control boards or external equipment, appropriate electrical protection (such as fusing) is recommended.

What’s included

1× TonSwitch module

Quick-start documentation (digital/QR)

What’s in the box

The TonSwitch module with pre-wired leads, ready for installation.
Printed user manual included. No additional accessories or mounting hardware are included.

Small-batch, individually tested

Each TonSwitch unit is assembled and tested individually.
This is a professional tool built in small batches — not a mass-market gadget.

FAQ

Is TonSwitch the compressor replacement?

No. TonSwitch is a control interface used during a retrofit when a technician installs a conventional ON/OFF compressor and needs a stable ON/OFF command from a PWM board.

Why not just use a generic relay module?

Many generic modules lack proper filtering and hysteresis and aren’t built for humidity/vibration. That’s why techs see false cycling, corrosion issues, or unstable behavior. TonSwitch is designed specifically to solve that.

Does it work on every model?

TonSwitch solves the PWM to ON/OFF conversion problem. Compatibility depends on the retrofit method and model. If you share your model/approach, we can advise before purchase.

Is it hard to install?

It’s designed for technicians. Most installs are straightforward with the included documentation.

Is TonSwitch affiliated with LG?

No. TonSwitch is an independent professional tool and is not affiliated with LG.

Ready to stop improvising on PWM retrofits?

TonSwitch gives you clean ON/OFF control from PWM, with hysteresis filtering and a fully potted, field-ready build.

Fewer callbacks. Cleaner installs. More confidence.

Small batch available • Ships from USA • Professional use only

Field-tested by real technicians

“I can confidently say this device performs better than the generic module I used before. The design and electrical characteristics make a real difference in the field.”

Orlando - Refrigeration Technician
10+ years of field experience

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TonSwitch - PWM to ON/OFF Interface

$24.99 USD
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