Wellis Hot Tub Not Heating Up? Fixes for Common Issues

It's frustrating when your Wellis hot tub is not heating up properly. A non-heating hot tub fails to provide the warm, relaxing experience you expect. Heating problems are among the most common issues with Wellis hot tubs.

But don't worry - many common hot tub heating problems can be fixed with simple troubleshooting and maintenance.

Check Simple Solutions First

Start troubleshooting by checking some easy potential issues first:

• Make sure the hot tub is plugged in and the breaker is on. Check for a tripped breaker or blown fuse stopping power from reaching the hot tub. Reset breakers and replace fuses as needed.
• Verify the hot tub temperature control or thermostat is actually set to heat up the water. Make sure it's not off or set too low. Thermostats should be set between 98-104degF for typical use.
• Dirty or clogged filters can restrict water flow. This prevents adequate heating. Remove and thoroughly clean or replace filters to restore proper water circulation through the heater.

Taking a few minutes to check these basic issues can often get your Wellis hot tub heating again. If the problem persists after addressing these common solutions, move on to inspecting the mechanical heating systems.

Troubleshoot Heater and Circulation Pump

Proper water heating relies on the heater working in conjunction with the circulation pump. Issues with either component can lead to heating failures. Here's how to check these vital systems:

• Inspect whether the heater unit and circulation pump are both operating and circulating water when heat is called for. If not, a problem exists. Heater and pumps should activate when the thermostat requests heat.
• Modern Wellis hot tubs have a high-limit switch that trips to prevent overheating. Carefully locate and press the reset button if tripped. Newer models may have auto reset high limits.
• Make sure there is adequate water flow over and through the tub heater. Low flow will cause the heater high-limit to trip frequently. Water should freely enter and exit heater.
• Replace a defective heater or circulation pump that is not functioning properly despite troubleshooting. Call a technician for complex part installation.

Addressing heater and circulation pump problems will resolve many stubborn hot tub heating issues. Proper water circulation is required to transfer heat effectively.

Fix Plumbing and Water Flow Problems

For heat to transfer properly, a continuous high-volume flow of water must circulate through the hot tub plumbing system. Flow disruptions can impede heating. Check for:

• Closed valves or kinked plumbing lines blocking water movement. Open all valves and unkink lines.
• Clogged or obstructed plumbing intakes or jets preventing free circulation. Clean out debris with pipe cleaners.
• An adequate water level in the tub. Too low can interrupt water flow. Maintain 1-3 inches below tub rim.
• Old, worn filter cartridges collecting debris and restricting flow. Replace monthly.

Unclogging blocked plumbing and replacing filters restores proper water circulation volume to allow smooth heating. Low flow can cause overheating failures.

Rectify Faulty Temperature Sensors and Controls

Wellis hot tubs rely on accurate temperature sensors and control systems to regulate heating. Issues here can cause heating problems:

• Inspect that the temperature sensor/thermistor reads correctly when tested. Compare to external thermometer.
• Reset or replace the sensor if it is providing an erroneous reading leading to improper heating.
• Test topside control panel buttons and displays. Replace if defective or unresponsive.
• Probe and sensor wires can corrode. Check wiring connections are intact and contacts are clean.

Repairing or replacing faulty temperature instrumentation often resolves heater malfunctions. Erroneous temperature data will prevent proper heating regulation.

Maintain Proper Water Chemistry

For efficient hot tub heating, keep water chemistry balanced and free of contaminants:

• Test and maintain total alkalinity at 80-120 ppm and pH between 7.2-7.6.
• Shock the tub weekly with chlorine to oxidize organics and chloramine compounds.
• Drain and refill tub every 3-4 months if water quality deteriorates significantly.

Poor water chemistry slows heat transfer and strains the heater. Out of balance water can damage plumbing with corrosion and scale.

Check Electrical Issues

As complex electrical devices, hot tubs can develop electrical faults affecting heating:

• Inspect circuit boards for signs of damage or burnt/corroded contacts.
• Check supply and tub wiring for loose connections or damaged insulation.
• Test power supply voltage and amperage to heater. Consult electrician if out of specification.
• Severe electrical storms can cause surges damaging delicate electronics.

An electrician can diagnose and resolve electrical issues beyond basic checks. Electrical problems can disrupt heater function.

Consider Heater Replacement

If you've thoroughly troubleshooted other systems, the heater may need replacement due to:

• Mineral buildup or corrosion preventing heat transfer.
• Internal component failure from age or overheating damage.
• Repeated high-limit tripping signalling end of heater life.
• Visible cracking or leakage in the heater housing.

With new heaters costing $400-800, replacement is an investment. But a new heater can provide years of reliable operation.

When to Call a Hot Tub Technician

While many common heating issues can be resolved with diligent troubleshooting, sometimes it's best to call in a professional hot tub technician for repair assistance when:

• The problem involves complex electrical issues beyond your skill level.
• Major components like the heater or circulation pump require replacement.
• You suspect shell damage or a leak causing water loss.
• Troubleshooting has not successfully resolved the heating problem.

A qualified hot tub technician has specialized expertise to properly diagnose and fix stubborn heating problems. They have experience with brand-specific repairs and access to manufacturer parts. Don't hesitate to call them when needed.

Take proactive steps to minimize heating problems in your Wellis hot tub:

• Maintain clean filters to optimize water flow.
• Balance pH and alkalinity to prevent corrosion and scaling.
• Frequently test and adjust sanitizer levels.
• Shock water weekly to remove contaminants.
• Keep covers closed when not in use to retain heat.

Following the manufacturer's care and maintenance guide helps maximize your hot tub's lifespan and performance.

A non-heating Wellis hot tub is frustrating, but fortunately most common causes can be resolved with some troubleshooting. Start with easy solutions like checking controls, water flow, and pumps. Maintain water quality and chemistry. Replace damaged components as needed. With some diligent maintenance, you can get your Wellis hot tub heating up again and relax!