Chiller Pro and Chiller Lite Maintenance: The Real-World Care Guide for Your Ice Bath Chiller

Last reviewed: July 2026

Quick Answer

Chiller care is simpler than it might look at first. Check the filter, ventilation grille, and hoses roughly once a month, and clean any of them when they are actually dirty. Change the water when you see biofilm on the walls, notice a smell, or the water looks clearly dirty, not on a schedule. Drain the chiller before frost. On the Chiller Pro, test the RCD safety switch every few months. That is the whole rhythm, and it keeps both the Chiller Pro and the Chiller Lite running quietly and efficiently for years.

The official Chiller Pro manual and Chiller Lite manual are the complete reference, with diagrams, specs, and safety notes. This guide is the day-to-day companion, focused on the practical rhythm most owners settle into.

Chiller Pro vs Chiller Lite: What Differs for Care

Both chillers are robust and low-maintenance. They differ mainly in features, and those features translate into a slightly longer care list on the Pro.

• Chiller Pro (1,160 W input): two filters (a large 10-inch filter element and a small built-in filter), integrated ozone purification, and an RCD safety switch. Cools and heats.
• Chiller Lite (460 W input): one built-in filter (optionally expandable with a filter and housing kit), no ozone. Cooling only. Compact and quiet, built for milder climates, smaller spaces, and everyday use.

If you are still choosing between them, our Chiller Pro vs Chiller Lite comparison walks through the full decision. For the physics of how either unit actually cools your water, see how a water chiller works.

Care Rhythm at a Glance

Task	Chiller Pro	Chiller Lite
Filter	Check monthly. Rinse or replace only when actually dirty.	Check monthly. Rinse when actually dirty.
Ozone purification	Runs automatically. Keep at ~5 minutes per 15 minutes of filtration when scheduled.	Not available.
Ventilation grille	Check monthly. Vacuum when dusty.	Check monthly. Vacuum when dusty.
Hoses and connections	Check monthly for kinks or leaks.	Check monthly for kinks or leaks.
RCD safety test	Every few months.	Not applicable.
Water change	When you see biofilm, smell, or visible dirt.	When you see biofilm, smell, or visible dirt.
Clearance around unit	50 cm on all sides, always.	50 cm on all sides, always.
Frost protection	Drain the chiller once ambient drops below 0°C.	Drain the chiller once ambient drops below 0°C.
Storage	Upright, dry, 5 to 40°C.	Upright, dry, 5 to 40°C.

Filter Care: Check, Then Act

The manual gives a 2-to-4-week cadence as a safe baseline. How often you actually need to touch the filter depends on how many people use the tub, hair length, whether pets are around, and how often the tub is opened.

The rhythm we recommend:

• Once a month, take a look. Pull the filter out.
• If it is clearly dirty, rinse it or replace it. A rinsed filter is fine to reuse as long as it looks and feels clean.
• If it is only lightly used, put it back. No need to replace something that is still doing its job.

On the Chiller Pro, the large 10-inch filter element is a replaceable cartridge, and the small built-in filter is designed to be rinsed and reused. On the Chiller Lite, the built-in filter is rinse-and-reuse. If you use the optional filter and housing kit on the Lite, the cartridge in that kit follows the same "replace when dirty" logic.

A clean filter matters. A clogged one drops flow and makes the chiller work harder. But there is no reason to bin a filter that is still fine.

Water Change: When It Actually Needs It

This is one of the biggest myths in cold plunging: that the water needs changing on a schedule. It does not. Change the water when it actually needs it.

The three real triggers:

• Biofilm on the tub walls (a slippery, translucent film you can feel with a finger).
• A smell off the water when you lift the lid.
• Visible dirt or cloudiness that filtration is not clearing.

Beyond that, it is individual. Some owners change the water more often because they have several users, kids, or heavy training days. Others go months between changes with a solo routine and closed lid. Both are fine.

Two things stretch water life significantly:

• Cold water is naturally hostile to bacterial growth. The colder your tub, the longer the water stays clean.
• Ozone purification (Chiller Pro) neutralises bacteria and odours automatically, chemical-free. With scheduled ozone cycles and the lid closed when not in use, most Chiller Pro owners go weeks between water changes.

If the water is right for you, do not change it out of habit. If it is off, change it. That is the whole rule.

Ventilation, Hoses, and the RCD Test

Ventilation grille. Check it monthly. If dust and lint have built up on the grille or cooling fins, vacuum it clean. If it is fine, leave it. Free air circulation matters because the chiller releases the water's heat through it. A blocked grille drops efficiency and, over time, can damage the unit.

Hoses and connections. Look them over once a month. Watch for kinks, leaks, or a fitting that has come loose. If a threaded connection weeps, re-wrap it with PTFE tape and re-tighten.

RCD safety switch (Chiller Pro only). Every few months, press the TEST button. The lever should trip immediately to "0" (OFF). Reset it to "I" (ON). If it does not trip correctly, stop using the chiller and email us. This is a safety element, not a productivity feature, but you do not need to touch it every month.

The Non-Negotiables

These do not bend. Skipping them is where preventable damage happens.

• 50 cm of clearance on all sides. Both chillers need space around them so the fan can work. Never in a cabinet, a niche, or an enclosed shelf. Blocked airflow drops performance and can permanently damage the unit.
• Never cover the ventilation. No towels, clothing, or objects on the openings.
• Never run the pump dry. Before startup, the tub must be filled and all valves open. On the Chiller Pro, the filter lid must be firmly closed.
• Stand upright for 2 hours after transport. Any tilt or move, then wait 2 hours before switching on. This lets the refrigerant settle and protects the compressor.
• Frost protection. Once ambient drops below 0°C, drain the water from the chiller after your session. Freezing water inside the unit is the single most common avoidable damage.

Filtration Scheduling: You Do Not Need It Running 24/7

Once the chiller reaches your target temperature, the compressor stops, but the circulation pump keeps running for filtration. Continuous filtration adds a small amount of heat back into the water and pushes energy use up. Thanks to the Rhone ice bath's insulation, continuous filtration is not necessary.

Chiller Pro:

• Use the app's scheduler instead of continuous operation.
• Plan 3 to 4 filtration cycles per day.
• Keep ozone at 5 minutes per 15 minutes of filtration runtime.
• 30 to 60 minutes per cycle, depending on use and water clarity.
• Lid closed when not in use.

Chiller Lite:

• Same scheduler-over-continuous principle, minus the ozone timing.
• 3 to 4 short filtration cycles per day are enough.
• Lid closed when not in use.

Frequently Asked Questions

How often do I actually need to clean the filter?

Take a look once a month. Rinse or replace it only when it is clearly dirty. A rinsed filter is fine to reuse. The manual gives a 2-to-4-week cadence as a safe baseline; how often you actually need to touch it depends on how many people use the tub and how often it is opened.

How often should I change the water?

When it actually needs it. The three triggers are biofilm on the walls, a smell when you lift the lid, and visible dirt or cloudiness. There is no fixed schedule. Cold water is naturally hostile to bacterial growth, and on the Chiller Pro, ozone stretches water life significantly. Most owners go weeks between changes; some go longer.

What is the difference in maintenance between Chiller Pro and Chiller Lite?

The Pro has two filters (instead of one), ozone purification, and an RCD safety switch to test every few months. The Lite is simpler: one filter, no ozone, no RCD. Ventilation, hoses, frost protection, and the water-change logic are the same for both.

How much space does the chiller need?

At least 50 cm on all sides, both models. Never in a cabinet or tight niche.

Does filtration need to run around the clock?

No. Thanks to the Rhone tub's insulation, 3 to 4 short filtration cycles per day are enough. Continuous operation adds heat back into the water and raises energy use. The one exception is cold weather (1 to 5°C ambient), where continuous operation prevents ice forming inside.

What do I do if the pump will not start?

Usually there is air in the system. Check the water level and valves, close the filter lid firmly on the Pro, and open the drain until a steady stream comes out to release trapped air. If that does not fix it, we are one email away at hello@theralpine.com.

The Bottom Line

A Theralpine chiller is a low-maintenance piece of equipment in daily life. A monthly check on the filter, ventilation, and hoses. A water change only when your senses tell you it is time. An RCD test every few months on the Pro. Frost protection in winter, and 50 cm of clearance always. That is the honest whole.

The full official manuals with diagrams, specs, and safety notes live at theralpine.com/manuals, one for each chiller. Keep them close for reference.

Not sure which chiller fits you yet? See our Chiller Pro vs Chiller Lite comparison, the Chiller Pro real-world performance test, or the ice bath buyer's guide.

Ready for an ice bath without the hassle? Explore the Theralpine Rhone ice bath with Chiller Pro or Chiller Lite.

---