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Frank Little Butler hot water heater.Very hot water comes out the flow opening. turning down the temperature control does nothing to lower the temperture.
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The seals have gone. This is typical of any hot water dispenser that directly heats the water while it is under pressure. The water expands and eventually ruptures the seals. Typical life time of this type of water heater is 2 years. Through it away only this time buy the non-pressurize type of instant water heater. Search the web and you will find a few brands.
Hello Larry,
Unfortunately nothing can be done about the minimum flow for activation.
However, your heater should have a flow control dial that you can turn all the way clockwise which will reduce your activation rate to about 0.5 gal. but that's the absolute lowest.
If the reason is to conserve water than that's about all you can do.
However, if its because the water is too hot and your mixing in cold which is increasing the volume of water you are using, then you should have a burner or flame control, if its a dial turn clockwise for less flame on the burner or the heater may have a slide control which sliding more to the left will lower the burner flame.
Don't forget water valve maintenance in your manual, follow instructions for a water valve rebuild to restore performance to the heater.
The problem with all that type of water heater is that once the hot tap is turned on sufficient flow must be maintained through the water heater to keep the main gas burner alight. If the heat adjuster is turned up to high, then the person using the hot water will turn it down to a low rate which means the main burner will turn off and result in cold water. Try setting the heat control to the lowest setting that still gives hot enough water. If you have a thermometer adjust control for a temperature of around 50 to 55 degrees Celcius. You may have to fiddle with fine adjustments to get the temperature and flow rates to maintain a constant output of hot water. You may still have intermittent problems. If the heater only supplies baths or showers you could set the temperatuer even lower (45 to 50) to ensure that the hot tap is used more than the cold which will maintain flow and therefore heat.
Manual does not indicate you have a control valve, so problem is likely to be clogging of the core or stuck blend door. How hot are the heater hoses at the firewall? If not really hot, problem is likely clogging of the core. If they are hot, blend door is more likely stuck.
Look under the dash and see if you can see the temperature control actuator moving when you change the temperature setting. I think yours is an electric motor--a little black box attached to the heater box somewhere to the right of center. Let me know if you have questions.
is there a check valvle on hot water side of heater,a flow restriction of some sort, water pressure to the heater, a filter in the line, line pressure in the heater kicks out burner, when you turn on the water, line pressure drops, heater comes on, when you turn on water in other part of house, heater should not fire, so there has to be a check valve somewhere,in heater?
I found a way to get warm water in the shower, but I'm not sure it qualifies as a solution. After trying everything else I thought that maybe when I was feathering the faucet in the shower toward the cold side so I would get warm water that at a certain point it blocked the flow on the hot water side enough so that the sensor in the hot water heater sensed there was no demand in the line and it shut the water heater off. To test this, I went to the kitchen and turned the kitchen sink faucet all the way to the hot side and then turned it on so that I got a small flow of water. I waited for the water to get hot to be sure the hot water heater was working. Once it was hot, I left it running to keep demand in the line and then I went to the shower and turned the faucet on. When the water got hot I started feathering the control towards the cold side and soon I had warm water. So I think I'm right in that the sensor in the hot water heater was shutting the water heater off when the demand in the shower was lowered to a certain point when I was trying to adjust the water temp in the shower.
So now I can get warm water, but it means I have to leave the hot water running at another fixture in the house to create a false demand in the system so the hot water heater doesn't shut down. Is there a way to adjust the senor in the hot water heater so that it will stay on when I'm using the shower only, so I don't have to waste water by running another faucet when I want to take a shower?
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