Swell Sport · Practical guide

Sauna timer, delay timer and thermostat: different jobs

A sauna timer answers “how long?”, a delay timer answers “how long until it starts?”, and a thermostat controls a temperature setting. Mixing up those jobs can make an otherwise normal controller look faulty. Read the labels on your own equipment before changing anything; not every control system provides all three functions.

Swell Cedar Cube 2 in a home setting.

On-time: the period for which heating is enabled

In the Xenio WiFi CX001WIFI instructions, remaining on-time is a separate basic setting. The heater switches off when on-time expires or the heater I/O button is pressed. On-time is equipment operating time, not an instruction to remain inside for that period. When you finish, use normal stop and check that heating has stopped as the manual requires. ^[1]

Delay: time before heating begins

Xenio calls this pre-setting time. Its display counts down until the selected device switches on; the manual distinguishes this from the normal heating display. A countdown with the heater off may therefore be the selected operating mode rather than a heating failure. Check the displayed mode before attempting to increase temperature or repeatedly start the heater. ^[2]

Thermostat: the temperature-control job

The Wall SW45 and SW60 examples have a thermostat that maintains the desired temperature. This is distinct from the timer dial described alongside it. The cited instructions also say small changes near the high end can noticeably change air temperature. A dial position is not a universal temperature number, and an operating range is not a recommended bathing setting. ^[3]

Current temperature is not the target

On Fenix, the interface identifies current temperature as the sensor value and selected temperature as the target value. Write those as two separate fields if you are learning the display. Seeing a target on screen does not mean the cabin has reached it. Read the current value and heating state rather than treating the largest number as a readiness announcement. ^[4]

Make a label card for your installed control

Use these lines: start now—control shown at handover; finish heating—normal stop control; remaining on-time—display label; delayed start—available or not fitted; current temperature—display location; target temperature—display location. Photograph the normal screen and keep the card with your manual. For a dial-operated heater, sketch the dial labels rather than borrowing symbols from an app.

A mode-reading example

An owner sees a time counting down and assumes the sauna is already warming. Before changing settings, they compare the screen with the pre-setting illustration in the exact manual. If it is the delay state, they have identified the reason for the apparent inactivity without diagnosing a fault or adjusting the thermostat. If the actual display does not match a documented state, they photograph it for support instead of guessing.