If your hot water isn’t heating as expected, your immersion thermostat may need to be reset.

This short step-by-step guide will show you how to safely isolate power to your Eddi, locate your immersion cap, and reset the thermostat.

We’ll also explain what to do if your immersion cap doesn’t have a visible reset button and when to contact support.

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Timestamps:
0:06 – Isolating power to your Eddi
0:14 – Testing to confirm power is off
0:19 – Proceeding to reset steps
0:22 – Locating the immersion cap
0:28 – Resetting using the visible button
0:35 – What to do if no reset button is present

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What you’ll learn:
How to safely isolate your Eddi from power
How to identify your immersion cap
How to reset your immersion thermostat
When to contact a qualified technician

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⚠️ Safety Note: Always ensure power is isolated before working on your immersion thermostat. If you are unsure, please contact a qualified technician.

How To Reset Thermostat

0:04
How to reset immersion thermostat?

0:06
Turn power button on the bottom of the Eddy to AUS only when the screen hasgone blank on the Eddy, it is isolated from power.

0:14
To test, press one of the buttons on the front to ensure the screen does notcome on.

0:19
If it does not come on, proceed to the next step.

0:22
Your immersion cap should look something like this and is generally located atthe top of your hot water cylinder.

0:28
If there is a reset button visible, please proceed to press this to reset theimmersion thermostat.

0:35
If there is no reset button visible, please contact Activ8 Customer Support asa qualified technician need to perform next steps.

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✅ Step-by-Step Guide: How to Reset an Immersion Thermostat (Eddi system)

Safety first: Only proceed if you can safely isolate power to the Eddi. Do not remove any covers. If unsure, contact Activ8 Customer Support.

1. Isolate power to the Eddi

• Use the power switch on the bottom of the Eddi and set it to AUS / OFF.
• Wait until the screen goes completely blank.

2. Confirm power is off

• Press any front button to test—the screen should not come on.
• If the screen lights up, repeat Step 1 until it stays off.

3. Locate the immersion thermostat

• Find the immersion cap (typically on the top of the hot-water cylinder).

4. Press the reset

• If you can see a reset button on the thermostat, press it to reset.

5. If no reset button is visible

• Stop here and contact Activ8 Customer Support. A qualified technician is required for the next steps.

6. Restore power

• Set the Eddi power switch back to ON.
• Confirm the screen powers up normally and the system resumes operation.

If the thermostat trips again or won’t reset, contact Activ8 Customer Support for further diagnostics.

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