I am having trouble with hot water in the master bath of the house (shower, tub, and two sinks). I was informed that maybe the cartridge in the shower would possibly cause the problem. Replaced the cartridge and still having the same problem. I have hot water in the other bathrooms and kitchen in the house? I am very puzzled.
1) Two water heaters in house
2) Both are in the attic and seem to work at same time
3) Not the only bathroom up stairs
4) Can use any of the other bathrooms while running dish or clothes washer and get plenty of hot water.
5) sometimes get a little hot water in master but then goes luke warm with the hot side full blast.
6) master shower is posi-temp single handle and sinks and tub dual handle, and other bathrooms are set up the same way.

Anyone have any ideas?

Chances are one water heater is a dedicated water heater and serves Master Bath only. If that's so, check its temperature setting. If electric heater than you may be running on one heating element only.

They are gas heaters. How does a two heater system work? Does one supply the upstairs and one the down? Or is one the main supply and the other helps out?

Quote:

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Originally Posted by Milo Dolezal

Chances are one water heater is a dedicated water heater and serves Master Bath only. If that's so, check its temperature setting. If electric heater than you may be running on one heating element only.

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They are gas heaters. How does a two heater system work? Does one supply the upstairs and one the down? Or is one the main supply and the other helps out?