Home Improvement Questions? Ask a Handyman for Answers ASAP
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The solenoid doesn't play any part in the temperature control, so I suggest you don't replace that.When the heater can gets scaled up, which happens faster in a hard water area, the temperature of the water is less stable. I suggest the following test:1. Remove the shower handset so you have just the open end of the hose. Put the hose washer aside so that it doesn't get lost.2. Turn on the shower and run for 20 seconds at maximum power and maximum temperature. Does the shower make a lot of noise, like a kettle?3. While the water is running, switch abruptly to the coldest setting and direct the jet of the hose to the part of the shower tray (or bath) that's furthest from the waste. The hower unit should go silent. Do you get a lot of particles of scale coming out of the hose, with the water?
You're very welcome. However, if you're in a hard water area the problem is pretty much guarantee to recur, so you might want to budget for a new heater can. Quite often it's less work to replace the entire shower unit than the heater can, and you would have the advantage of a full warranty on all parts.
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