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I'm considering a Powerstar AE9.5 for my kitchen sink/dishwasher but have seen plenty of negative comments regarding water too hot, having to let drip after shut off to allow to cycle down, etc. Am I setting myself up for major head aches? I want simple. Turn on water - get hot water - turn off water - no hassles.
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Shower heads have flow limiters installed in them. This means the water heater cannot sense the water flowing and therefore it wont come on. Take the shower head off and look in the end for a piece of plastic that is in the swivel. Remove it. Then put the shower head back on.
The only Bosch tankless I have ever touched have been the 3 I have taken out and replaced with Rinnai. I think Bosch/Paloma/etc. have two problems:
1. They do not properly certify technicians before allowing them to install these units.
2. Their product is mediocre at best.
The biggest problem I've seen is that people don't vent them properly. The last one I pulled out had a combined vent length of 55'. 55 FEET! Absurd!
The units was condensing so much inside the vent that it washed out 2 gas control valves in ONE YEAR.
Buy Rinnai, buy Takagi, buy Noritz....maybe even a Navien (new player...time will tell)
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Factory certified technicians, preferably equipped to do the gas & plumbing without having to sub it out.
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Years of trouble-free hot water.
It sounds like a clog internally. Sometimes o-rings, or just debris (like scale) in the water will cause a blockage. If you decide to "operate" on it, make sure you shut off your water supply. If it's old, you may not be able to buy spare parts and should consider a full replacement.
Are you using a single lever faucet? The install guide does indicate that you may need to reduce the input from the cold water side to ensure that water stays at a consistent temperature (see page 7 of the installation and service manual). Also, remember, this is a SMALL hot water heater. So if you're running for any length of time at full output, it may not keep up with you (see page 8 of the service an installation manual). I found the manual online at http://www.airwater.biz/images_templ/bosch-water-heaters-ae3.4-manual.pdf.
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