Dometic RV Water Heater Adjustable Thermostat | 93105 | 110-150°F

Take control of your RV water heater's temperature with the Dometic 93105 Adjustable Thermostat Control. This genuine Dometic upgrade replaces the standard fixed-temperature thermostat on compatible Atwood/Dometic water heaters — giving you the ability to dial in your preferred water temperature in 10°F increments across a 110°F to 150°F range. The right upgrade for RVers who want personalized comfort, energy savings, or scald protection without replacing the entire water heater.

What This Upgrade Does

The standard thermostat on most RV water heaters is a single-setpoint device — heats to one fixed temperature, no user adjustment. The 93105 replaces that with an adjustable thermostat that lets you choose your water temperature based on your specific needs:

• Position A: 110°F (lowest setting)
• Position B: 120°F
• Position C: 130°F
• Position D: 140°F
• Position E: 150°F (highest setting)

10°F increments give you meaningful control without the over-engineering of continuously variable adjustment.

Real-World Reasons to Upgrade

Why RVers add adjustable temperature control to their water heater:

• Energy savings — lower temperatures (110°F–120°F) reduce propane and electric consumption, especially useful for boondocking or extended stays
• Scald protection — keep water temperatures safer for kids, older travelers, or sensitive users
• Hot water capacity boost — higher temperatures (140°F–150°F) mean more hot water effectively available when blended at the fixtures
• Climate adaptation — dial up the temp in cold weather, dial down in summer
• Health considerations — some health guidance recommends 120°F as a balance between scald prevention and Legionella bacteria control
• Customization — match the water heater to your actual usage rather than a one-size-fits-all factory setpoint

How the Thermostat Works

The 93105 is a closed-switch temperature controller:

1. The thermostat sits in continuity with the water heater's solenoid gas valve circuit
2. When water temperature is below setpoint, the switch is closed — voltage flows to the solenoid valve, propane flows, burner fires
3. When water temperature reaches the dialed-in setpoint, the switch opens — voltage is interrupted, solenoid closes, burner shuts off
4. As water cools, the switch closes again — burner fires to maintain setpoint

Standard closed-loop temperature control — simple, reliable, no electronics to fail.

Wide Atwood / Dometic Water Heater Compatibility

The 93105 fits an extensive range of Atwood and Dometic G-Series, GC-Series, and GH-Series water heaters. Organized for easy reference:

6-Gallon G-Series

• G6A: G6A-3E, G6A-4E, G6A-6E, G6A-7E, G6A-8E
• GH6: GH6-3E, GH6-4E, GH6-6E, GH6-7E, GH6-8E

6-Gallon GC-Series

• GC6A: GC6A-7E
• GCH6: GCH6-4E, GCH6-6E, GCH6-7E
• GC6AA: GC6AA-7E, GC6AA-8E, GC6AA-9E, GC6AA-10E
• GCH6A: GCH6A-7E, GCH6A-8E, GCH6A-9E, GCH6A-10E

10-Gallon G-Series

• G10 / G610: G10-2E, G10-3E, G610-3E
• GH10 / GH610: GH10-2E, GH10-3E, GH610-3E

10-Gallon GC-Series

• GC10: GC10-1E, GC10-2E
• GC10A: GC10A-2E, GC10A-3E, GC10A-4E
• GCH10A: GCH10A-2E, GCH10A-3E, GCH10A-4E

That's coverage across the majority of Atwood/Dometic 6-gallon and 10-gallon water heater installations from the past several generations. Verify your model number on the water heater's manufacturer label before ordering.

Genuine Dometic OEM Upgrade

As a Dometic factory upgrade part, the 93105 is built to original specifications for a precise drop-in fit in compatible water heater installations.

Paired Component — Gas Control Valve

If you're servicing an Atwood/Dometic water heater and need to address gas valve issues alongside this thermostat upgrade, the matching gas control valve depends on your water heater capacity:

• Dometic 92078 Gas Control Valve — for 6-gallon DSI water heaters
• Dometic 92089 Gas Control Valve — for 10-gallon DSI water heaters

Both components often fail or need attention together, so if one needs replacement, it's worth checking the other.

⚠️ Professional Installation Recommended

Water heater thermostat replacement involves opening the water heater's electrical and gas valve compartment. Installation should be performed by a qualified RV service technician, especially since improper installation can affect safety operation of the gas valve. After installation, verify proper temperature control across the adjustable range.

Key Features

• Genuine Dometic OEM adjustable thermostat upgrade
• Replaces fixed-setpoint thermostats in compatible water heaters
• 110°F to 150°F adjustable range
• 10°F increments (positions A through E)
• Wide Atwood/Dometic G/GC/GH Series compatibility
• Closed-switch temperature controller
• Energy savings, scald protection, and customization benefits
• Direct drop-in fit for compatible water heaters

Specifications

• Brand: Dometic
• Part Number: 93105
• Type: RV Water Heater Adjustable Thermostat Control
• Adjustable Range: 110°F to 150°F
• Adjustment Increments: 10°F (positions A through E)
• Position A: 110°F
• Position E: 150°F
• Switch Type: Closed-switch temperature controller
• Output: Voltage to solenoid gas valve
• Compatible Water Heaters: Atwood/Dometic G-Series, GC-Series, GH-Series 6-gallon and 10-gallon models (see compatibility list above)