Introduction

The guide shows how to replace the relay (transformer) in a timer switch. This transformer is used for heater control. Without this transformer, the switch does not work.

The timer switch was bought at Gamma (link), a large construction store.

Locate the screw holes. Locate the screw holes.
  • Locate the screw holes.

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Use the #1 Phillips head screwdriver to remove the screws. This may cost some prying effort. Use the #1 Phillips head screwdriver to remove the screws. This may cost some prying effort.
  • Use the #1 Phillips head screwdriver to remove the screws. This may cost some prying effort.

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Open the case by pulling the back case from the front case. Open the case by pulling the back case from the front case.
  • Open the case by pulling the back case from the front case.

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Black Friday
Broken doesn't stand a chance.
Use the #1 Phillips head screwdriver to remove the screws on the inside. Use the #1 Phillips head screwdriver to remove the screws on the inside. Use the #1 Phillips head screwdriver to remove the screws on the inside.
  • Use the #1 Phillips head screwdriver to remove the screws on the inside.

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Pull the PCB (printed circuit board) from the case. Pull the PCB (printed circuit board) from the case. Pull the PCB (printed circuit board) from the case.
  • Pull the PCB (printed circuit board) from the case.

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Locate the relay. Locate where the relay is connected to the PCB. Locate where the relay is connected to the PCB.
  • Locate the relay.

  • Locate where the relay is connected to the PCB.

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Melt the solder with the soldering iron. Don't burn yourself by touching the hot soldering iron tip. Use the desoldering pump to suck up the old solder.
  • Melt the solder with the soldering iron.

  • Don't burn yourself by touching the hot soldering iron tip.

  • Use the desoldering pump to suck up the old solder.

  • Pull the relay from the PCB.

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Put a new relay at the same place as the old relay. Use new solder and the soldering iron to connect the new relay to the PCB.
  • Put a new relay at the same place as the old relay.

  • Use new solder and the soldering iron to connect the new relay to the PCB.

  • Don't burn yourself by touching the hot soldering iron tip.

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Conclusion

To reassemble your device, follow these instructions in reverse order.

One other person completed this guide.

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