My titan n120 puts out scalding hot water from the sinks. But it is only luke warm from my shower. It use to be hot. I checked the internal resets, they are fine. What else should I check and how?
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the common cause of that is you have higher water pressure at your sink tap..and have lower water pressure at your shower.. because your using a multi-point type water heater..it requires 2.0 ltrs/min..
you do this...try to open your shower together with your sink tap faucet.
that adjuster is there to reduce the water temperature so that scalding from boiling water doesn't occur
they can be adjust but if this problem has come in after a period of time then the sensor wax inside the adjuster is not as it should be.
they do fail and need replacing
most plumbers put the unit on the hot water outlet because they are lazy as the standard says that it is primarily for use on the shower, bath, basin systems and wash machines and kitchen sink are not required to be temp controlled.
If you aren't getting any error codes, then the heater is probably doing its job. Your problem is probably somewhere in your plumbing system. The most common reason you get this sort of problem is due to cold water mixing in the hot water system. There are a number of causes for a "cross connection" :
-Faulty check valve -Missing check valve on reciculation return line -Faulty shower cartridge -Thermostatic mixing valve set too low -Faulty thermostatic mixing valve -Faulty anti-scald valve
The easiest way to confirm a cross connection is to: 1) shutoff the cold water entering the tankless heater 2) open hot water valves around the house. If you still have water flowing at your hot water fixtures, then you have a cross connection.
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.
Do you mean the other faucets in the house are hot and only the shower is warm?
If so there is an anti-scald adjustment on the faucet that needs to be turned up a few notches. Havent adjusted a Grohe faucet but most faucets you rmove the handle and behind the handle is a nothced adjustment ring that prevents the faucet from getting too hot. This ring, or stop, is pulled out and twisted clockwise(or counter clockwise to set higher or lower max temp, then pushed back.
maybe you can look up grohe to see which way ring or stop adjusts for hotter water.
where the pipes are laid out it may run along an outer wall and the cold weather is cooling the water before it gets to the shower try to track the pipe from your water heater to your shower and insulate it where it is coldest
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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