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Light flashes and water doesn't heat

Will cut water on for several minutes to wait for it to heat. Light on front of unit flashes and water will not heat at all.

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1 Answer

The heating element continues to heat even after the hot water tap is turned off thus popping the thermal switch. The red light is off on front of unit but you can hear the water heating. Any ideas?


check the pressure control that switches the element on or off
if it is faulty then it switches on when the tap is turned on dropping the pressure but it will not recognize that the increase in pressure when the tap is turned off so it keeps heating the water.

Apr 07, 2015 | Stiebel Eltron TEMPRA 24 Tankless Water...

1 Answer

Unit cuts off after 3 mins of heating water


Sounds like the heating element in the unit is shorting out. If you are handy you may be able to replace the part but I would recommend having someone look at it who is familiar with this unit.

Feb 16, 2014 | Stiebel Eltron DHC-E 10

1 Answer

Pilot light went out


open the inspection door at the base of the unit ,usually at the front of the heater.There will be a round knob with On,pilot and off ,turn the knob to off. Go and have a cuppa. The air inside the gas line has to disapate.After 10 mins turn the knob to pilot, press down on the knob ,holding it down and at the same time press the ignition button several times and peer into the unit to see if there is a flame. If so continue to hold the knob down for one minute.Release the knob and turn to On. Your unit should start to heat straitaway. Good luck

Mar 12, 2013 | Water Heaters

1 Answer

Sime super 80.. Heating and hot water at the same time?


going off on a safety possible high temp unit needs service such a nozzle filter if oil or thermocouple if gas

Jun 16, 2017 | Water Heaters

2 Answers

Pacific water heater light dims and water does not heat up


sounds like an electrical problem, consult an electrician

Jul 12, 2010 | Pacific International Water Heater...

1 Answer

Unit flashes the number 20


A 20 error code means the high limit switch is being tripped. This is most typically caused when scale develops in the heat exchanger. I'd recommend performing a descale on the heater to resolve the problem. Make sure to follow the instructions that came with your isolator valve kit.

Jul 10, 2010 | Noritz 8.4 Gallon Residential Direct Vent...

1 Answer

I have a problem with my Rinnai hot water heater giving me intermitant hot and cold. The water gets hot and I get in the shower. A few minutes later the hot water stops and I have to shut of the hot water...


We had the same problem - the hot water would only be hot for 3 -5 minutes and shut off, then we had to turn the water off, wait a few minutes, and do it again. VERY FRUSTRATING.

Solution: The Rinnai serviceman showed me the heat-exchanger blower/fan: It was clogged with dust and moths.

Another clue: Our Rinnai was extremely noisy when the heat came on. After the fan was cleaned and replaced, it is nearly silent.

If you are reasonably mechanically inclined:
TURN THE BREAKER / POWER OFF to the unit.

The blower-fan is located in the lower central area of the unit (at least on our unit). If you draw imaginary north-south, east-west lines through the center of the unit, the fan is in the lower-left quadrant. There is a spring clamp securing the black rubber accordian-like tube to the fan. There are two screws that secure the fan to the unit. there are two plugs that connect to the fan, as well as a third air-flow sensor that should be removed. then you can look at the fan unit, as well as the grill on the underside of the heat-exchanger that should be cleaned.

My thought was to go out and get a simple bug-screen, and place it over the air-input outlet vent going outside, but the repair guy said that although it may sound good, if that screen ever gets clogged, or reduces airflow to the Rinnai, then the unit will work harder, or even shut off, giving the same problem.

May 24, 2010 | Rinnai Webstone The isolator EXP tankless...

1 Answer

I have a digistat scr with a flashing red light and no heating there is nothing wrong with the batteries, this only occured after a poweer cut.


Try this first before condeming the unit.

1. Turn off the power supply to the Digistat SCR (receiver unit)
and leave for 5 seconds.
2. Turn on power to SCR unit and check red light is on.
3. Press override button No.2 and check the green light comes
on and boiler fires.
4. Press & hold down button No.1 (Keep depressed), then
press No.2 and keep depressed. {The Red LED light will flash
a couple of times and then it will go out}
5. Now release both the buttons – {the two LED lights should
come back on}
6. Get the Digistat+2RF/+3RF unit and stand two metres away
from the SCR unit with the Digistat+2RF/+3RF unit in your hand.
7. Remove the battery cover and fit the batteries.
8. The Red LED light on the SCR will now flash for approx. 7
seconds.
9. This confirms that the radio signal is being sent and
received.
10. The Digistat+2RF/+3RF and the SCR are now successfully
linked by a dedicated RF address.

Mar 21, 2009 | Water Heaters

1 Answer

Water heats for about 3 seconds and goes cold


Take the cover off and look for reset that has trip.If you can't find no reset turn the power off and wait for five minutes,turn on and turn water on also to see if you get hot water.

Mar 14, 2009 | TitanNet TITANTANKLESS. COM PRESENTS THE...

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