Hot Tub Not Working

Hot Tub Not Working? Here’s What to Do Next

When your hot tub suddenly stops heating, starts leaking, or trips the electrics, it can be stressful — especially if you’ve got guests or a holiday let.
We’ve already covered the most common faults in our Common Hot Tub Problems Guide, so this article is about what to do next — and when to call in a professional.

🔥 1. Hot Tub Won’t Heat Up

If your spa isn’t heating, it’s often down to low flow, a dirty filter, or a failing heater element.
Quick checks:

  • Top up water to above the filter housing.

  • Remove or clean the filters.

  • Open all jets and air controls.

  • Check the display for errors (FLO / DR / DRY / OH).

⚠️ If it still won’t heat — switch it off. Continuing to run a tub with no flow or a faulty heater can cause further damage.

⚡ 2. Hot Tub Not Turning On / Tripping the RCD

Power issues are common and can be dangerous if not handled properly.
Quick checks:

  • Ensure the isolator is switched on.

  • Check your RCD/RCBO at the fuse board.

  • Power the spa down fully for 60 seconds and restart.

If it keeps tripping, it’s usually moisture inside the heater or a failing electrical component.
👉 Don’t keep resetting the breaker — this is one of the quickest ways to cause further damage.

💧 3. Hot Tub Leaking Water

Small leaks become big problems fast — especially in timber-clad spas or holiday lets.
Common leak points: heater unions, pump fittings, jet bodies, pipe joins.

Quick checks:

  • Look for drips at the base or near the pack.

  • Check heater unions for weeping seals.

  • Isolate power if water is near electrics.

🚨 If you can see water pooling, don’t run the spa.

🌀 4. Pump Not Working / Jets Not Working

No flow or weak jets usually means dirty filters, airlocks, or pump failure.
Quick checks:

  • Clean or remove filters and retry.

  • Bleed the pump gently at the union to release trapped air.

  • Check air controls and diverter valves are open.

If the pump hums but doesn’t move water — or is silent — there’s likely a mechanical or electrical fault.

🖥️ 5. Hot Tub Error Codes

Modern spas display codes like FLO, DR, OH, SN, and more. These can point to flow issues, sensor faults, or heater failures.
Quick checks:

  • Note the code exactly.

  • Clean filters, top up water, and restart.

  • If the code returns, don’t force it to run.

💬 Tip: Send us a photo of your error code — it speeds up the diagnosis.

🧰 6. Why Calling Early Saves You Money

Many spa owners keep resetting trips or topping up water to avoid a call-out. But this often turns a small fix into an expensive repair.

✅ Early intervention prevents:

  • Pump and heater burnout

  • Cabinet or base rot from leaks

  • Electrical damage

  • Lost income for holiday lets

We offer fast, reliable call-outs across Jacksonville — and we actually fix the fault, not just “turn it off and on again.”

📍 Jacksonville Hot Tub Repair & Servicing

Whether your spa won’t heat up, trips the power, or leaks water, we’ve got you covered.

📞904-206-8730
✉️ ryan@tommytubs.com
🌐 www.tommytubs.com

FAQ

What should I do if my hot tub won’t heat up?

Check water level, clean or remove filters, and open all jets. If it still doesn’t heat, turn it off and call a professional to inspect the heater safely.

Why does my hot tub keep tripping the RCD?

This often means a fault in the heater element or moisture in the system. Don’t keep resetting it — call a qualified hot tub repair man.

Can I run my hot tub if it’s leaking?

No. Leaks can cause structural and electrical damage quickly. Turn the spa off and book a pressure test or seal replacement.

My hot tub jets aren’t working — what now?

Clean the filters, check air controls and water level, and bleed the pump if needed. If there’s still no flow, it may be a pump or air control issue.