Lay-Z-Spa hot tubs are a popular choice for home spa enthusiasts, offering affordability, convenience, and comfort. However, one of the common issues users face is the spa frequently tripping the power supply, which often points to a faulty PTC (Positive Temperature Coefficient) heater. This component is crucial for regulating water temperature, and when it malfunctions, it can cause your spa to trip your breaker or RCD (Residual Current Device). Fortunately, replacing the PTC heater can restore your spa to full functionality.
Understanding the Problem
When a Lay-Z-Spa keeps tripping, especially during the heating cycle, the PTC heater is often the culprit. PTC heaters are designed to self-regulate their temperature and are generally reliable, but over time, they can degrade due to exposure to moisture, corrosion, or simply age. A compromised heater may draw irregular current, leading to repeated tripping of your power source as a safety measure.
Before replacing the heater, always rule out simpler issues. Check the spa’s wiring, plug, and socket for signs of wear or moisture. If everything else looks intact, and the lay z spa heaters consistently trips when heating, replacing the PTC heater is a logical next step.
What You’ll Need
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Replacement PTC heater (make sure it’s compatible with your Lay-Z-Spa model)
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Screwdrivers (Phillips and flathead)
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Multimeter (optional, for testing continuity)
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Silicone sealant (optional, to reseal if needed)
Step-by-Step Replacement Guide
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Unplug the Spa
Safety first: disconnect your Lay-Z-Spa from the power supply and ensure the spa is fully drained and dry before attempting any internal repairs. -
Disassemble the Pump Housing
Use a screwdriver to carefully open the pump unit. Most Lay-Z-Spa models have several screws around the plastic casing. Remove them and gently lift off the cover. -
Locate the PTC Heater
Inside, you’ll find the heating element attached to a metal plate or embedded in a plastic mount. It’s usually wired to the control board. Take a picture of the wiring before proceeding to ensure proper reassembly. -
Disconnect and Remove the Faulty Heater
Detach the heater from its connectors. Some models use plug-in terminals; others might be soldered. Remove any mounting screws or clips and take out the faulty heater. -
Install the New Heater
Place the replacement PTC heater in the same position and reconnect the wires exactly as they were. Double-check all connections are secure. -
Reassemble and Test
Close the pump housing, screw it back together, and plug in your spa. Power it on and monitor it during the heating cycle. If the spa no longer trips, the repair is successful.
Replacing the PTC heater in a Lay-Z-Spa is a cost-effective way to fix a spa that keeps tripping, avoiding the need for a full pump replacement. With basic tools and a bit of patience, most handy DIYers can complete this repair in under an hour. Always consult your Lay-Z-Spa manual and observe electrical safety precautions. If you’re unsure, consult a professional technician to perform the repair.