When it comes to hot water in your home, you've likely taken it for granted on more than one occasion (we know we have!).

• Dux Hot Water Proflo 3 Pilot Light
• Dux Proflo Gas Hot Water System Pilot Light
• Dux Hot Water Proflo Pilot Light Bulb
• Dux Hot Water Proflo Pilot Lighter
• Dux Hot Water Proflo Pilot Light Kit
• Dux Hot Water Proflo Pilot Lights

But what happens when your hot water isn't working like it should and may need some repairs? We have put together some of the more common issues that can arise if you have an instantaneous gas hot water system however if you would like some more information, give Brisbane Plumbing and Drainage a call on {{ context.constants.company_info | parse_json | dig: 'secondary_phone' }} and we would be happy to assist.

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Turn the red knob to the pilot position, facing forward, press red knob down and click the piezo ignitor that is located at the bottom right of the opening, click the piezo 5 or 6 times quickly whilst continuing to hold the red button down, once pilot is lit, you'll have to either use a mirror or get down low to peer inside to see if it lit, keep red button depressed for 10 seconds and then release it. I have a Dux proflo 135FNG hot water system and Its not heating up the water I've re ignited the pilot light after a power blackout loss of the power grid and I've no manual to check if the set up is correct. I have a Dux proflo 135FNG hot water system and Its not heating up the water I've re ignited the pilot light after a power blackout loss of the power grid and I've no manual to check if the set up is correct.

What is an instantaneous gas hot water system?

An instantaneous gas hot water system has a range of names, including:

• Tankless gas hot water system
• Continuous flow gas hot water system
• On-demand gas hot water system

They are generally quite small and are located on the wall, heating water as needed instead of heating and then storing. They are also one of the most efficient, if not the most efficient, hot water systems available.

How does an instantaneous gas hot water system work?

Instantaneous gas hot water systems, as their name suggests, run on gas and function by propelling cold water through a pipe made of copper - known as a heat exchanger - that has heat applied to it directly.

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When you turn on a hot water tap, a flow sensor is set off in your instantaneous gas hot water system and the heating commences. This triggers a gas burner and the required amount of water is heated to the temperature that is needed and flows to your tap. Then, when you turn your tap off, your hot water systerm turns off too!

Common instantaneous gas hot water system problems

Pilot light won't ignite

If you are finding that your water heater pilot light won't ignite, remember that instant systems need moderate to high water flow to ignite the pilot light. Therefore, run your tap on high for a few minutes and see if this ignites the pilot light.

Sporadic hot and cold water

Having intermittent hot and cold water is quite a common problem with instantaneous systems. This can be caused by a range of things including:

• The diaphragm on the gas meter could be faulty.
• Not enough gas may be getting to your hot water system (which can be caused by an under-sized gas bottle).
• You may have a fauty shower head or a restrictor which may be affecting a taps' ability to be registered as a 'hot water' tap.

Lukewarm water

Another issue than can arise is that of lukewarm water coming through the pipes, instead of hot water. This can be caused by a faulty thermostat or the diaphragm may need replacing.

Less water production

If you are finding that your hot water suystem is producing less water than it should, or at a lower water pressure than before, this can be caused by:

• The strainer valve on the cold inlet may be blocked.
• The thermostat may be broken or faulty

If water is also coming out at a lower pressure, this can be related to the pilot light. Remember though, instantaneous units supply hot water at a lower pressure than storage systems do!

No hot water at all

Finally, if you do not have any hot water there are a few things you can check before calling in the professionals.

1. Check a stovetop or other gas appliance to see if this still has gas flowing to it. If it does, the gas supply isn't the problem - if it doesn't, you've hopefully found your issue. If you find that there isn't any gas flowing to other appliances, check your gas valve meter and call your local utility provider for more assistance.
2. Double check that the continuous flow is plugged into it’s electrical socket.
3. If your system has a controller, check it is on and the temperature is set to the appropriate level.

Dux Hot Water Proflo 3 Pilot Light

Who do see about instantaneous gas hot water system problems?

A qualified professional! Ensuring that you speak to an experienced gas fitter is crucial to receiving the best outcome for everyone - it also ensures that your insurance/warranty isn't voided (which can happen if you complete the works yourself) and the job will get done right the first time. Give Brisbane Plumbing and Drainage a call on {{ context.constants.company_info | parse_json | dig: 'secondary_phone' }} and we can help.

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Resources

BUILD (Continuous Flow Hot Water Systems):https://build.com.au/continuous-flow-hot-water-systems

Energy Rating (Gas Water Heaters) :http://www.energyrating.gov.au/products/water-heaters/gas-water-heaters

Rheem continuous flow gas hot water systems come in a variety of sizes, and all feature a minimum six-star energy rating and a 10-year warranty on the heat exchanger. Rheem hot water heaters also boast unique features including the Q Factor to eliminate the fluctuations in available hot water that occurs with some continuous flow units, as well as a Flame Safe protection system to shut down the water heater before overheating can occur.

What maintenance can I do on my Rheem hot water system?

To ensure the safe operation of your Rheem Hot water system, please only conduct basic maintenance as specified for owners via the Rheem hot water owners guide. Here are a few Rheem specific troubleshooting hints tips to go through before calling the professionals.

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Dux Proflo Gas Hot Water System Pilot Light

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Dux Hot Water Proflo Pilot Light Bulb

Common Rheem Gas Hot Water issues

Before you start, check the Error/fault code on the hot water unit itself. Modern Rheem Hot Water systems include a display panel for simple error checking, any error showing up here can be referenced in your user manual and either be fixed by the homeowner or be passed onto a plumber.

Dux Hot Water Proflo Pilot Lighter

Rheem Gas Hot Water Error Codes

Consult your manual as these may change per product but for current Rheem hot water systems, the current error codes are as follows:

Dux Hot Water Proflo Pilot Light Kit

Why do I have no hot water on my Rheem gas system?

Pilot Light

With any gas hot water system, it is incredibly common to have your pilot light extinguished for what seems like no reason at all. Things that can cause this to happen include wind, rain, flooding and sometimes animals. If you have mains gas check you haven't been disconnected from the gas network. I you are using LPG tanks to supply your gas, make sure they haven't run out or that the valse is off. To relight the pilot light check your Rheem system and/or manual which will have easy instructions on how to achieve this.

Leaking pressure relief valve

Dux Hot Water Proflo Pilot Lights

Most hot water systems include an overflow outlet valve often called a relief valve which will at times relieve pressure from the hot water tank. If you feel your Rheem gas hot water system is visibly leaking a lot more than the standard bit of pressure runoff, now is the time to call a licenced plumber.

My water is too hot, how do I turn it down?

If you feel your hot water is much hotter than it should be, you could try adjusting the thermostat on your Rheem hot water system downward. Make sure not to set lower than 60°C for health and safety reasons.If you still cannot get the temperature perfect, don't hesitate to call a plumber.

When all fails and If you are ever in doubt about your Rheem Gas Hot water system, Pure Plumbing can supply, install, repair, and service Rheem hot water heaters in and around the northern regions of Sydney, including the CBD and Eastern Beaches.

Ref - https://www.rheem.com.au/help/troubleshooting

Need more help with your hot water system choices?