Royal Heat RS-100 Thermostat Replacement

Flip the device over so the bottom is facing up.

Remove the two 10mm screws holding the back panel using a Phillips #2 screwdriver.

Place the Flathead Screw driver parallel with the gap between the back and the heater body, then twist until the two parts of panel are separated. You may have to do this on four sides of the panel.

Remove the front panel by pulling them apart. The front panel should come out easily.

Remove the two dial caps from the two switches by lifting them up.

Remove the two 10 mm Phillips screws using a #2 Phillips screw driver. One attaches the gold metal bracket to the heater coil housing and the other attaches the fuse holder to heater coil housing.

Unplug the wire that goes from the bottom of the power switch to the heater coils. To unplug pull down on the wire until it breaks free.

Unplug the wire that goes from the bottom of the power switch to the fuse holder. To unplug the wire, pull the wire away from the fuse holder.

Unplug the wires located on the right side of the heat coil housing. Both plugs will come off together. To unplug the wires, pull down on the wire until it breaks free.

Grab the Switch and Circuit Board Assembly with one hand and slide it up. You will need to wiggle it to break it loose. While wiggling it, slide it up until it is clear of the plastic rails.

Unplug the two wires, with blue ends, that go from the Power/Fan switch and from the bottom of the Circuit Board to the fan. To unplug the wires, pull them away from the fan assembly until they break free.

Pull off the black thermostat extension by pulling up. This should require very little force and should come apart easily.

Remove the nut from the thermostat using the adjustable wrench. Place the wrench around the nut and turn it counter-clockwise. Remove the thermostat/circuit board assembly from the gold metal bracket.

Flip over the circuit board

Use the soldering iron to remove solder from the five points connecting the thermostat to the circuit board. Pull the thermostat away from the circuit board.