E1, E2 and E3 are sensor and connection faults, and the code meanings vary by control panel make. Note the exact code, work through the checks for that code below, and if it keeps returning treat it as a fault rather than a glitch.
Applies to: steam showers
INTRO HERE
Compatible with many shower cabin brands including
Quick diagnosis
If your steam shower is showing these symptoms:
- The display shows E1, E2, E3 or another letter-number code
- The unit stops mid-session and shows a code instead of restarting
- A continuous beeping sound plays alongside the code
- The code reappears as soon as you try again
Likely causes, most likely first
- E1 … a temperature sensor fault. The probe wire connection to the temperature sensor has come loose or failed.
- E2 … a sensor fault that trips the safety shutdown. Most often the water-level sensor is scaled up, or the temperature sensor (thermistor) has failed; either one shuts the generator down to stop it overheating.
- E3 … a communications or keypad fault. The data cable between the control panel and the generator has usually lost its connection; unplug it and reconnect it firmly.
Likely cause
These code meanings come from one steam-shower maker's fault list, and codes can vary by control panel make, so treat this as a starting point rather than a universal table. E1 and E2 both trace back to a sensor … either the water-level sensor or the temperature sensor (thermistor) … while E3 points to a lost connection on the data cable between the panel and the generator. A continuous beeping sound alongside any code often means the generator can't detect water, or that a keypad button is stuck.
Check this first
- Note the exact code shown, since E1, E2 and E3 point to different faults
- With the power off, unplug and firmly reconnect the data cable running between the panel and the generator
- Check for a continuous beeping alongside the code, which usually means the generator isn’t detecting water, or a button is physically stuck
How to identify your part
Error codes aren’t standardised across every control panel make … an E1 on one model isn’t guaranteed to mean the same thing on another. The codes above come from one steam-shower maker’s fault list. If your panel shows a code outside E1-E3, note the model code printed on the front or back before contacting us, since the table isn’t the same on every panel. Our MK117 electronics box replaces an MK117 control box behind an E3 fault; it won’t fix E1 or E2, which are sensor faults rather than an electronics fault.
Parts that fix this problem
The following replacement parts usually fix this issue.
Not sure which replacement part you need? Send us a photo and we will help identify the correct replacement.
How to fix it
- Note the exact code on the display before doing anything else
- Turn off the power and check the data cable connection between the control panel and the steam generator
- For an E1 code, check the temperature probe’s wire connection at the generator end
- For an E2 code, check the water-level sensor and temperature sensor for limescale build-up
- For an E3 code, reconnect the data cable and check no keypad button is stuck or pressed
- If the code returns after these checks, the sensor or panel itself likely needs replacing
Also described as
- Steam shower
- Steam shower cabin
- Hydro massage shower
When to call a professional
If cleaning the sensors and checking the connections doesn't clear the code, or the code keeps returning, treat it as an electrical fault and call a qualified electrician rather than keep resetting the power.
