
Workmanship Guaranteed
Licensed & Insured
Upfront Fair Pricing
Finance Available
Bosch Solar Hot Water Repairs – Gold Coast
If your Bosch solar hot water system has gone cold, is leaking from the roof, or the booster keeps cutting out, Todd’s Plumbing & Electrical can help.
We repair and service Bosch Solar Wizard close-coupled systems and Bosch split solar hot water systems with electric or gas boosting – common setups in Australian homes that use roof panels and a storage tank to supply low-cost solar hot water.
With 20+ years on the Gold Coast, our licensed plumbers understand how local climate, roof layouts and water quality affect Bosch solar systems – and what it takes to get them running efficiently again.

Bosch Solar Hot Water Systems We Service
Roof-mounted solar collectors
Ground-level storage tank
Closed-loop (heat-exchange) system suitable for a wide range of climates
Available with electric or gas boosting, using a Bosch booster unit.
“Solar Wizard” branding on tank/labels
Typically roof panels feeding a ground tank with inbuilt or external Bosch booster
Designed to maximise solar contribution and top up with electric or gas when needed.
Bosch Solar Panels & Boosters
Bosch-branded solar collectors and panel sets
Bosch continuous-flow gas units used as solar boosters
Controllers, pumps and sensors that manage circulation and boosting.
Common Bosch Solar Hot Water Problems (and How We Fix Them)
1. No Hot Water or Only Lukewarm Water
Showers are stone cold, or only lukewarm
Hot water runs out very quickly, especially mornings or late at night
Failed electric element or thermostat in the Bosch booster
Gas booster not igniting or locking out
Solar pump not circulating water through the panels (split systems)
Airlocks or partial blockages in solar pipework
Incorrect tariff/timer settings so the booster isn’t cutting in
Test the element, thermostat and electrical supply to the Bosch booster
For gas-boosted systems, check ignition, gas supply and error history
Confirm pump operation, flow and temperature difference across collectors
Bleed air from the solar circuit and clear restrictions
Re-set timers and boosting schedules to match your household usage

2. Bosch Solar Not Heating on Sunny Days
Tank temperature stays low even after a full day of sun
Roof panels feel cool when they should be warm or hot
Likely causes:
Circulation pump failure (stuck, seized, or no power)
Faulty roof or tank sensors, so the controller doesn’t call for pumping
Incorrect installation (flow direction, piping gradients)
Excessive air in the system stopping circulation
Test pump power draw and replace failed pumps
Check controller, wiring and sensor readings for realistic temperatures
Flush and bleed the solar lines to restore proper circulation
Confirm layout matches Bosch installation requirements and correct if needed

3. Leaking Solar Panels, Pipes or Tank
Constant dripping from the roof near solar panels
Rust marks down walls or gutters
Puddles around the tank, valves or pipe connections
Likely causes:
Corrosion or internal tank failure
Cracked collector, damaged header rail or fittings on the roof
Perished seals and unions from age or movement
High mains pressure stressing joints and valves
Pressure-test the system to locate the exact leak
Replace unions, fittings, valves, roof penetrations and short pipe sections where viable
Replace damaged collectors if they’re split or badly corroded
If the tank has failed, we’ll explain options for a new solar, heat pump or high-efficiency replacement system

4. PTR Valve Constantly Dripping
Likely causes:
Continuous trickle or flow from the PTR drain line
Hissing or steaming at the relief outlet on hot days
Likely causes:
Excess pressure inside the tank
Worn or faulty PTR valve
High mains pressure with no pressure-limiting valve
Thermostat or controller overheating the water and lifting the valve
Check mains and system pressures and adjust if required
Replace the PTR valve with a compliant new unit
Install or confirm a pressure limiting valve on the cold supply
Test thermostats and boosting controls to stop overheating

5. Pump Not Running / Running Constantly
System stays cool despite sun (pump not running)
Pump noise or vibration all day, even when it shouldn’t be on
Burnt-out or seized circulation pump
Faulty relay or controller output
Sensor giving incorrect readings to the controller
Airlocks causing cavitation or stalling
Test pump voltage and current draw
Check controller output and wiring integrity
Replace pumps, relays or sensors where needed
Bleed air from the circuit and verify correct flow direction and fall

6. Error Codes, Flashing Lights or Controller Faults
Gas booster tries to start and then shuts down
Error lights or codes on the Bosch unit
Water temperature surging hot/cold
Read and interpret error codes on Bosch boosters where available
Check gas supply, combustion air, ignition and flame detection
Inspect filters, inlet screens and flow sensors
Test controllers, reset lockouts and replace faulty components with genuine parts

7. Noisy, “Boiling” or Overheating Collectors
Gurgling, knocking or “kettling” sounds on the roof
Steam or very hot discharge at vents or relief points on extreme days
Air trapped in solar lines
Stagnation due to poor circulation
Incorrect pipe gradients or installation issues
Faulty non-return valves or tempering valves
Bleed air from the solar circuit
Confirm correct pipe gradients and flow direction, and rectify where practical
Replace non-return and tempering valves as needed
Adjust system controls to minimise stagnation and overheating events

Why Gold Coast Locals Choose Todd’s for Bosch Solar Repairs

Local & family-owned – over 20 years on the Gold Coast
Bosch solar experience – familiar with Solar Wizard, split solar and Bosch booster setups
Fast, same-day hot water repairs – we prioritise no-hot-water calls
Up-front pricing – clear quotes and options before we start
5-star service – trusted by homeowners, strata managers and property managers

Service Areas
Why Choose Todd’s Plumbing & Electrical
✓ Family-owned Gold Coast business
✓ 20+ years specialising in solar hot water repairs
✓ Licensed plumbers & electricians (no subcontractors)
✓ Fast same-day service available
✓ 5-star local reviews & long-term customer relationships
✓ Experts in Solahart system diagnostics

Call the Bosch Solar Hot Water Experts
Q: Why is my Bosch solar hot water not heating properly?
A: The usual culprits are a failed electric or gas booster, a solar pump that isn’t circulating, sensor or controller faults, or airlocks and blockages in the solar pipework. A licensed plumber can test each part, bleed the system and reset your boosting so the tank actually heats up when you need it.
Q: How long should a Bosch solar hot water system last?
A: With correct installation and regular maintenance, most Bosch solar systems can last around 10–15 years or more, though coastal air, high water pressure and poor water quality can shorten tank life. Frequent leaks, rust around fittings or repeated breakdowns are signs it may be approaching end of life.
Q: Can you repair leaks in Bosch solar panels or do they need replacing?
A: Leaks from pipe joints, valves or fittings are often repairable. If the collector itself is cracked, split or badly corroded, replacement is usually more cost-effective and safer long-term. We’ll always outline both repair and replacement options before you decide.
Q: Do you work on Bosch Solar Wizard systems?
A: Yes. We service and repair Bosch Solar Wizard systems, including their panels, storage tanks and electric or gas boosters. If you’re unsure of the exact model, we can identify it from photos or on site.
Q: How often should I service a Bosch solar hot water system?
A: As a general rule, a check every 3–5 years is wise – including valve checks (especially the PTR valve), inspection of collectors, testing of sensors and pumps, and ensuring the booster and safety controls are working correctly. Regular maintenance reduces the risk of sudden failure and extends the life of the system.

Aquamax
Apricus
Beasley
Bosch
Chromagen
Conergy
Dux
Ecosmart
Envirosun
Edwards
Everhot
Hills
Leda
Quantum
Midea
Neopower
Reece
Rheem
Rinnai
Sanden
Saxon
Stiebel Electron
Solahart
Solargain
Solar Oz Solar
Power Sun Ray
Sun Solar
Thermasun
Vulcan






