Thermann Hot Water System Troubleshooting Guide

Thermann hot water system troubleshooting

Thermann offers a range of energy-efficient models, including gas, electric, and solar options. Many of their systems are designed to maximise energy savings, which can help reduce utility bills and environmental impact. They are popular among homeowners due to their quality, efficiency, and variety of options. While individual experiences may differ, the general agreement is that Thermann offers dependable and efficient hot water solutions.

However, like any household appliance, they can sometimes encounter issues that need troubleshooting.

No Hot Water

  1. Check if the circuit breaker or fuse for the water heater is tripped or blown. Reset the breaker or replace the fuse if necessary.
  2. Ensure the thermostat is set to the desired temperature. If it’s too low, adjust it to the recommended setting (usually around 60°C or 140°F).
  3.  The heating elements might be faulty. This can often be diagnosed with a multimeter. If an element is defective, it will need to be replaced.

Insufficient Hot Water

  1. As with no hot water, the thermostat may be set too low. Increase the temperature setting.
  2. Over time, sediment can accumulate at the bottom of the tank, reducing the efficiency of the heating elements. Flushing the tank can help remove sediment buildup.
  3. The dip tube may be broken, allowing cold water to mix with the hot water at the top of the tank. If this is the case, the dip tube will need to be replaced.

Water is Too Hot

  1. Reduce the thermostat setting to a safe level.
  2. If adjusting the thermostat doesn’t resolve the issue, the thermostat may be faulty and require replacement.

Strange Noises

  1. Sediment can cause popping or rumbling noises. Flushing the tank can help alleviate this issue. 
  2. A faulty or loose heating element can cause noise. Tightening or replacing the element should resolve the problem.
  3. Noise can be often  due to the age and wear of the system.

Water Heater is Leaking

  1. Check all water connections to ensure they are tight. Use a wrench to tighten any loose connections.
  2. If the pressure relief valve is leaking, it may be defective and need replacing.
  3. If the tank itself is leaking due to corrosion, the entire water heater will likely need to be replaced.

Pilot Light Won't Stay Lit (Gas Water Heaters)

  1. The thermocouple may be defective or misaligned. Inspect the thermocouple and replace it if necessary.
  2. Clean the pilot light orifice to ensure a steady flame.
  3. Ensure there is no interruption in the gas supply and that the gas valve is fully open.

Preventative Maintenance Tips

Regular maintenance can help prevent many of the common issues associated with Thermann hot water systems.

Annual Inspection

Have your hot water system inspected by a professional at least once a year to ensure all components are functioning correctly.

Flush the Tank

Flush the tank every six months to remove sediment buildup. This can help maintain efficiency and prolong the life of the water heater.

Check Anode Rod

Inspect the anode rod annually and replace it if it is heavily corroded. The anode rod helps prevent tank corrosion.

Test the Pressure Relief Valve

Lift the lever on the pressure relief valve to ensure it releases water. If it doesn’t, replace the valve.

When to Call a Professional

While many minor issues can be resolved with basic troubleshooting, some problems require the expertise of a professional. Call a professional if you encounter any of the following – 

  • Persistent leaks that cannot be resolved by tightening connections.
  • Frequent tripping of the circuit breaker.
  • Signs of significant corrosion or damage to the tank.
  • Any issue you are uncomfortable or unsure about handling yourself.

By following this troubleshooting guide and performing regular maintenance, you can ensure your Thermann hot water system operates efficiently and reliably for years to come.

Frequently Asked Questions about Thermann Hot Water Systems

Thermann offers a variety of hot water systems, including –

  • Gas Continuous Flow: Instant hot water systems that heat water on demand.
  • Electric Storage: Traditional tank systems that store and heat water.
  • Gas Storage: Tank systems that use gas to heat and store water.
  • Solar Hot Water Systems: Utilise solar energy to heat water, often with electric or gas boosters.
Thermann offers highly efficient models, particularly in their continuous flow and solar ranges. Continuous flow systems only heat water when needed, reducing energy waste. Solar systems harness renewable energy, significantly lowering operating costs.

With proper maintenance, Thermann hot water systems can last:

  • Gas and Electric Storage Systems – typically 10-15 years.
  • Continuous Flow Systems – often 15-20 years.
  • Solar Systems – varies, but panels generally last 20+ years with proper care.

Yes, Thermann hot water systems come with comprehensive warranties:

  • Storage tanks – usually have a 7-10 year warranty.
  • Continuous flow systems – often covered by a 10-12 year warranty.
  • Solar systems – warranty terms vary, but panels often have extended warranties.

Thermann hot water systems are manufactured and distributed by Reece Group, one of Australia’s largest plumbing and bathroom product suppliers. Reece Group collaborates with leading manufacturers to design and produce Thermann hot water systems, ensuring they meet high standards of quality and reliability.

Reece Group’s involvement ensures that Thermann products benefit from extensive industry experience and a strong commitment to innovation and customer service. Their distribution network makes Thermann hot water systems widely available across Australia, supported by professional advice and installation services from Reece’s extensive network of plumbing and bathroom stores.

Call the Ironclad Plumbing team if you are based in Blue Mountains or Penrith. 24/7 emergency plumbing for the region.

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