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.

Image 1/2: Image 2/2:
  • Locate the screw holes.

Add Comment

Image 1/2: Image 2/2:
  • Use the #1 Phillips head screwdriver to remove the screws. This may cost some prying effort.

Add Comment

Image 1/2: Image 2/2:
  • Open the case by pulling the back case from the front case.

Add Comment

Image 1/3: Image 2/3: Image 3/3:
  • Use the #1 Phillips head screwdriver to remove the screws on the inside.

Add Comment

Image 1/3: Image 2/3: Image 3/3:
  • Pull the PCB (printed circuit board) from the case.

Add Comment

Image 1/3: Locate where the relay is connected to the PCB. Image 2/3: Locate where the relay is connected to the PCB. Image 3/3: Locate where the relay is connected to the PCB.
  • Locate the relay.

  • Locate where the relay is connected to the PCB.

Add Comment

Image 1/3: Don't burn yourself by touching the hot soldering iron tip. Image 2/3: Use the desoldering pump to suck up the old solder. Image 3/3: Pull the relay from the PCB.
  • 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.

Add Comment

Image 1/2: Use new solder and the soldering iron to connect the new relay to the PCB. Image 2/2: Don't burn yourself by touching the hot soldering iron tip.
  • 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.

Add Comment

Conclusion

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

One other person completed this guide.

0 Comments

Add Comment

View Statistics:

Past 24 Hours: 0

Past 7 Days: 1

Past 30 Days: 2

All Time: 65