Visual Guide to FX Replacement
![old heater](https://king-electric.com/wp-content/uploads/2018/07/old-heater.jpg)
The old heater needing to be replaced.
![Take off grill](https://king-electric.com/wp-content/uploads/2018/07/Take-off-grill.jpg)
- Turn off power at breaker
- Take off grill
- Remove interior.
![Remove wire nuts](https://king-electric.com/wp-content/uploads/2018/07/Remove-wire-nuts.jpg)
Remove wire nuts from interior.
![wall can](https://king-electric.com/wp-content/uploads/2018/07/wall-can.jpg)
Remove remaining screws and take wiring out of wall can.
![Trim wall opening](https://king-electric.com/wp-content/uploads/2018/07/Trim-wall-opening.jpg)
Trim wall opening for new King W Series wall box.
![Apply power wires](https://king-electric.com/wp-content/uploads/2018/07/Apply-power-wires.jpg)
Apply power wires with grommet and ground wall box. Insert into wall leaving 1/2 inch
![Attach can to stud](https://king-electric.com/wp-content/uploads/2018/07/Attach-can-to-stud.jpg)
Attach can to stud on one side and use 2 screws just behind the wall board to prevent the other side from moving forward.
![Move wiring to left](https://king-electric.com/wp-content/uploads/2018/07/Move-wiring-to-left.jpg)
Move wiring to left and insert interior into wall can and screw interior at top of can.
![Turn power on and test](https://king-electric.com/wp-content/uploads/2018/07/Turn-power-on-and-test.jpg)
Turn power on and test.
![Apply grill](https://king-electric.com/wp-content/uploads/2018/07/Apply-grill.jpg)
Apply grill and your finished. Model: W2420