If your HOTTAP Go shows an error code or isn't behaving as expected, this guide will help you find the cause and fix it. Most issues come down to one of four things: power, gas, water supply, or wind.
New to the unit? Start with the HOTTAP Go User Guide to make sure everything is set up correctly.
First, try these quick checks
These resolve the majority of issues, whatever the symptom:
- Power — your 12V supply or power bank is charged to 100% and all cables are firmly connected.
- Gas — the fuel supply is connected and turned on.
- Water — the reservoir has enough water and the filter is free from debris.
- Position — the unit is upright on a level surface, sheltered from wind, with all vents clear.
Still no luck? Find your error code or symptom below.
Error codes at a glance
- E1 — Residual fire protection fault (a flame signal was detected without ignition) → contact us
- E2 — Temperature probe failure → contact us
- E3 — Flame not lit (ignition failure or accidental flameout) → fix it yourself below
- E4 — Low power → fix it yourself below
- E5 — Overheat or dry burn (thermostat) protection failure → contact us
- E6 — Tilting protection failure → check & contact us
- E7 — No water flow (low flow fault) → fix it yourself below
- E8 — Solenoid error → fix it yourself below
E1 — Residual fire protection fault
The unit has detected a flame signal even though the burner hasn't ignited. Switch off your HOTTAP Go, disconnect the gas supply, and contact Joolca Customer Service.
E2 — Temperature probe failure
Switch off your HOTTAP Go and contact Joolca Customer Service.
E3 — Flame not lit
The burner failed to ignite, or the flame went out unexpectedly.
- Check your fuel supply is connected and turned on.
- Check all vents are clear — the burner needs proper airflow to ignite.
- Shelter the unit from wind. In very high winds the burner may struggle to ignite or stay lit.
- Try igniting again, and watch for a flame through the viewfinder slot on the side (see "Reading the flame" below).
E4 — Low power
Your power source isn't delivering enough power. The igniter tells you a lot here — listen to it:
- 4–5 clicks per second — full power, all good.
- 1–2 slow clicks per second — power is low or unstable.
To fix:
- Charge your power bank or 12V supply to 100%.
- Check the cables are plugged in firmly at both ends.
- If the error persists, try a different power source.
E5 — Overheat or dry burn protection failure
Switch off your HOTTAP Go, allow it to cool completely and try again in a few minutes. If the problem persists please contact Joolca Customer Service.
E6 — Tilting protection failure
Check the unit is sitting upright on a flat, level surface. If the code remains, contact Joolca Customer Service.
E7 — No water flow
The unit isn't detecting enough water flow to run safely.
- Check there's enough water in the reservoir to allow ignition.
- Check the reservoir filter is free from debris.
- Flush the system to clear a possible internal blockage:
- Fill the water reservoir.
- Press the blue Water Flow button.
- If water flows from the outlet, the blockage has cleared — set up your HOTTAP Go again following the standard instructions.
E8 — Solenoid error
Step 1 — check your power source
- Check your power source is charged to 100%.
- Check all cables are connected securely — a loose connection is a common cause.
Step 2 — check the solenoid connection
This quick check often resolves the issue immediately. First, switch the unit off and disconnect it from power and gas. If you'd rather not open the panel, contact Joolca Customer Service and we'll help you out.
- Remove the side panel by unscrewing the two screws at the bottom and sliding the panel off.
- Locate the solenoid and follow its two wires to the connectors.
- Disconnect, then firmly reconnect the connectors.
- Reattach the side panel and test for ignition.
No error code? Find your symptom
Shuts down shortly after starting
- Shelter the unit — strong wind may be blowing the flame out.
- If it shuts down when you increase water flow, the water supply is the likely culprit: check hoses for kinks and inspect all filters, including the threaded brass inlet fitting, for debris.
- Check both power and gas are sufficient and properly connected.
Weak flow or pressure
Usually caused by a low power supply, a partially blocked filter, or a kinked hose.
- Increase the flow setting using the dial on the shower handle.
- Check hoses are free from kinks and blockages.
- Check the inlet filter is free from debris.
- Check your 12V power supply is well charged - weak power reduces pump output.
- Confirm all water hose connections are tight, with no air leaks.
Reading the flame (viewfinder)
Look through the viewfinder slot on the side of the unit to observe the burners:
- Steady blue flame with yellow tips — normal, all good.
- No flame — the unit hasn't ignited (see E3).
- Flame flickers, moves side to side, or stretches upward — wind interference; shelter the unit.
- Mostly yellow flame — possible propane mixture issue; shut down and contact us.
Good to know
- Maximum water temperature is 60°C / 140°F - the HOTTAP Go is limited by the laws of physics (and applicable regulatory standards).
- When showering, do not exceed 50°C / 122°F.
- Never block ventilation openings - proper airflow is required for safe operation.
- The HOTTAP Go is a portable appliance intended for recreational use only. It is not designed to supply drinking or sanitary water.
Still won't work?
If you've worked through the steps above and your HOTTAP Go still isn't behaving, get in touch with our Customer Service team — a short video of the issue helps us diagnose it much faster.