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Royal Heat RS-100 Thermostat Replacement

Introduction

The thermostat regulates temperature, if you change the temperature, using the dial, and the heater is not responding then you need to replace the thermostat.

What you need

  1. Royal Heat RS-100 Thermostat Replacement, Panel: step 1, image 1 of 1

    • Unplug the power cord.

    • Flip the device over so the bottom is facing up.

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

    Edit

  2. Royal Heat RS-100 Thermostat Replacement: step 2, image 1 of 3 Royal Heat RS-100 Thermostat Replacement: step 2, image 2 of 3 Royal Heat RS-100 Thermostat Replacement: step 2, image 3 of 3

    • 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.

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  3. Royal Heat RS-100 Thermostat Replacement: step 3, image 1 of 1

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

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  4. Royal Heat RS-100 Thermostat Replacement, Switch and Circuit Board Assembly: step 4, image 1 of 1

    • 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.

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  5. Royal Heat RS-100 Thermostat Replacement: step 5, image 1 of 2 Royal Heat RS-100 Thermostat Replacement: step 5, image 2 of 2

    • Make note of where you disconnect the wires from so you can properly connect them when re-assembling heater.

    • 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.

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  7. Royal Heat RS-100 Thermostat Replacement: step 6, image 1 of 2 Royal Heat RS-100 Thermostat Replacement: step 6, image 2 of 2

    • Make note of where you disconnect the wires from so you can properly connect them when re-assembling heater.

    • 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.

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  8. Royal Heat RS-100 Thermostat Replacement: step 7, image 1 of 1

    • Make note of where you disconnect the wires from so you can properly connect them when re-assembling heater.

    • 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.

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  9. Royal Heat RS-100 Thermostat Replacement: step 8, image 1 of 2 Royal Heat RS-100 Thermostat Replacement: step 8, image 2 of 2

    • 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.

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  10. Royal Heat RS-100 Thermostat Replacement: step 9, image 1 of 2 Royal Heat RS-100 Thermostat Replacement: step 9, image 2 of 2

    • Make note of where you disconnect the wires from so you can properly connect them when re-assembling heater.

    • 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.

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  11. Royal Heat RS-100 Thermostat Replacement, Thermostat: step 10, image 1 of 1

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

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  12. Royal Heat RS-100 Thermostat Replacement: step 11, image 1 of 1

    • 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.

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  13. Royal Heat RS-100 Thermostat Replacement: step 12, image 1 of 1

    • Flip over the circuit board

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  14. Royal Heat RS-100 Thermostat Replacement: step 13, image 1 of 1

    • 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.

    Edit
Conclusion

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

Author

with 4 other contributors

Luke Nora

Member since: 10/14/13

216 Reputation

2 Guides authored

Badges: 7

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Team

Cal Poly, Team 11-35, Amido Fall 2013 Member of Cal Poly, Team 11-35, Amido Fall 2013

CPSU-AMIDO-F13S11G35

4 Members

13 Guides authored

1 Guide Comment

I disconnected the fan and plugged it into an outlet and it works, but it no longer comes on when the heater is working. Same results when the switch is on FAN.

Mike Gnazzo - Reply Share

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