What you'll need:
- (2) 17mm wrenches
- Replacement pressure stat
1. Remove the panels from your machine.
2. In the back left corner, you'll find your pressure stat. Remove the wired connections.
3. Remove the nut at the boiler connection point with the copper tube using a 17mm wrench.
4. This will allow you to handle the pressure stat without fear of twisting the malleable copper. Taking the stat and tube out, and using both 17mm wrenches, place them like this -
5. With the thinner wrench holding the pressure stat steady, and the other on the nut fastening it to the copper tube, squeeze the two wrenches together to break the nut loose.
6. Using your fingers, unscrew the nut from the stat, and pull the pressure stat free. Discard the old pressure stat.
7. To replace, fasten the new stat onto this tube and replace it on the boiler following these steps in reverse order.