Question about Rinnai Digital Remote Water Heater Control Mcc-45-4us

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No power to keypad

No hot water keypad out

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  • Anonymous Mar 14, 2009

    no power to the keypad

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I had a similar problem, the water flow control device was bad.
If you disconnect Connector B2 and the unit will start, then that will confirm the problem. Rinnai has a new improved part for replacement.

Posted on Jan 18, 2009

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Posted on Jan 02, 2017

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No hot water , no heater


No Hot Water - Electric Water Heater Troubleshooting

www.whirlpoolwaterheaters.com/owner-center/.../no-hot-water/
Whirlpool's video explaining potential reasons your water heater is not working ... Troubleshooting and Repair · No Hot Water (Video) · Replacing a Heating ...

Electric Water Heater Repair and Troubleshooting ' Whirlpool

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Troubleshooting and Repair of a Standard Electric Water Heater. No Hot Water ... Not getting power is a common reason new water heaters don't work.

Troubleshooting Electric Water Heaters in MINUTES ~ Step ...

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https://www.youtube.com/watch?v=SlyStHM9Nr0
Oct 4, 2013 - Uploaded by electronicsNmore
My tenant has a electric 30 gallon water tank. cimarron by Reheem. model ... So if u notice your water is overly hot and then notice no hot water ...

Dec 26, 2015 | Water Water Heaters

1 Answer

Unit stiebel Tempra 24Hot water is running through house but cold water pipe is getting hot. Hot water pipe is not getting hot. When cold water connection is removed and water is turned on hot water is...


follow this steps and fix it. God bless you

If there is no hot water, first push the reset button on the high-temperature cutoff; test the thermostat and replace if faulty (see below). Test the heating elements and replace if faulty (see below).
If there is not enough hot water, adjust the thermostat settings. As needed, reset, test and replace thermostats and heating elements if faulty.
If the water is too hot, adjust the thermostat settings and reset. Test and replace the thermostat or high-limit cutoff (see below).
An electric water heater is a 240-volt appliance that can deliver a fatal shock. Always turn off power to the heater at the electrical panel 585dc480-4881-44a8-afda-7267c0f3de26.jpgbefore beginning work, and verify that power has been shut off. Make sure others in the house know not to restore electricity prematurely. If you have any doubt as to whether electricity has been turned off, seek professional assistance.

Oct 02, 2013 | Stiebel Eltron TEMPRA 24 Tankless Water...

1 Answer

Hi...I have a Whirlpool water heater and the water only stays hot for a few minutes. How do I adjust the temperature or settings so that I can have hot water all the way through the shower instead of...


I am guessing this is an ele water heater and the temp setting are not the problem.
Problem: Not enough hot water or water temperature too low. When the top of the tank is hot the upper thermostat removes power from the upper heating element and transfers the power to the lower thermostat and heating element. If the lower thermostat is defective, then the lower portion of the tank will not be heated and the supply will be greatly reduced.
Check for power at the upper thermostat terminals where the power is sent to the lower thermostat and heating element. If there is no power then the upper thermostat should be replaced. If there is power then check for power at the lower heating element. If there is no power at the lower heating element then replace the lower thermostat.
If there is power to the lower heating element then it should be getting hot. If it is not, replace it. Another possibility is a broken dip tube. Check for a broken dip tube and replace if necessary.

The dip tub is located under the fitting where the hot water comes out.

Feb 03, 2011 | Whirlpool Water Heaters

1 Answer

We are having a problem with our rheem hot water system not haveing enough hot water. We called the eletricity supplier, who attended and said there relay was out of action. They said they would wire the...


If the relay is bad no source of power is going to make it work,you could try taking off blue covers.Kill power first!. there is a red reset button underneath push and turn power back on see if that works.Plus the breaker in the power panel might of popped,you'll see when you go to shut off power.If not thermostat is bad or heating elements,probubly stat,depending on age of heater,would be better to replace,most heaters have at least a 6 yr warranty,but that doesn't cover labor.Nothing wrong with system Hope that helps

Jan 27, 2011 | Rheem Water Heaters

1 Answer

Running out of hot water I replace both heater coils and still seems like were running out of hot water the top coil has 230 volts going to it but the lower has no volts going to it jeff thanks


Hi,

Only one of the hot water heater elements will have power going to them at a time...
When the water at the top of the tank gets hot then the top thermostat should switch the power to the bottom one... this may not be happening...therefore you are only getting about a thrid of a tank of hot water...

Electric Water Heater not Working
heatman101

Jan 12, 2011 | Rheem 50 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

If there is an electricity failure how can we have a hot shower


Easy answer is you cant on these units. These tankless units store no hot water and need a 240V power supply to operate.

However!
In some areas in far north Queensland I came up with a back up power unit (I used to work for Rinnai who make similar units). These were for remote units that used battery lighting and just wanted a bit of hot water for remote workers.

Basically you need a spare car batttery and an electrical inverter or a back up petrol generator. These hot water units only use a very small amount of electrical power even when that are operating. I had a guy run the hot water for nearly two weeks on a car battery and inverter after cycone Larry hit Innisfail in North Queensland.

Depends how often you get power losses as to how much money you want to spend to cover yourself (99.9999% don't bother with no real hassles).

Jul 23, 2010 | Rheem Tankless Hot Water Heater...

1 Answer

Hot water wont get hot


1-First check for power to water heater and remove acces panels on heater to check power at thermostats. Thermostats have a reset button on them that trip and can be pressed to reset.

2- If none of the above have changed any thing and you have power you may have elements gone bad.

If an element is gone at top you will get scalding hot water then go to cold.

If an element on the bottom is gone you will get luke warm water then will get cold.

May 17, 2010 | Water Heaters

1 Answer

Tankless Hot Water Heater Rtg-74pvp-2 7.4 Gpm: Unit isn't turning on when I turn on the hot water...


Has it ever run? Is cold water going to cold water inlet? Hot out to hot water piping? Power ON? Control pad on? gas pressure correct?

May 16, 2010 | Rheem Tankless Hot Water Heater...

1 Answer

My hot water will not get hot at all. Model SE40M12AA01 Stop getting hot over night. Breaker to heater was tripped, I reset it and still no hot water.


Your upper thermostat on the hot water tank may be shorting out causing your breaker to trip. Remove the outer panel door on the side of the hot water tank and test for power going to the elements. Also check for water as the tank may be leaking and causing the short

Feb 21, 2010 | General Electric GE SmartWater Household...

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We just relocaed a modual home with a Rheem electric 40 gal warrior hot water heater, we have no idea of previous care, in setting up the home and trying to get hot water, after turning the water on,...


sounds like the element is burned out....probably got turned on before it was completely full of water. You can get a kit that has new elements and upper and lower thermostat in it. Those are the only things that can go wrong with an electric water heater....other then leaks.

Oct 28, 2009 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

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