Question about Bosch PowerStar AE125 AE125 Whole House Electric Tankless Water Heater...
Posted by Anonymous on
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Posted on Jan 02, 2017
My experience in Germany with tankless water heaters was not good; the delivery promised was only vaguely warmed water; they are no replacement for standard devices.
If you can find closet or under-counter (in the kitchen) space you might look into the 20 gallon units made for RVs or small mobile homes/campers. They are not expensive to run and cost well below the ~ $400 US price I saw when looking at the Bosch. If you are worried about the efficiency of them or concerned with the cost of electricity in your area, you could have an electrician install a high-capacity (15-20 Amp) toggle switch (looks like a normal light switch) and manually turn it off completely when it is unused for a longer period of time.
In any case, before you jump on the Bosch bandwagon, check the degree (or lack) of satisfaction from current owners:
I wouldn't be encouraged to buy that one.
Posted on Sep 18, 2008
Posted on Jan 23, 2009
The vent pipe you use is the correct size for the heater.Longer runs require bigger pipe.I also would check to see if the water is getting to hot.
Posted on Mar 16, 2009
Thermo coupler may be defective. it controls the main gas valve by closing main if pilot is out. make sure thermo coupler bulb is positioned over and near tip of pilot flame, but not in the flame. Thermo couplers are inexpensive and easy to change out.
Posted on May 06, 2009
This is also known as a flame rectification sensor. It basically is what the computer board uses to detect if the pilot flame is lit. When it makes an attempt to fire is there any evidence of flame ignition? This error does not mean that the sensor is bad for sure. The error could be caused because the water heater is only making three attempts to fire and then shutting down. These water heaters are very complex and have many sensors,valves, ect that are all controlled by a computer board. Some of the basic things to check for are... Make sure that you have plenty of gas pressure. These units have a built-in pressure switch and will have issues if they are starved of gas. Most of these tankless water heaters are up to 400,000 btus and a half inch gas line or undersized connector won't work well. You can also check and make sure there is no pipe dope are debris stuck in the screen inside the gas line where it enters unit. Inspect the pilot assembly for debris or obstructions and try to blow out with compressed air. Also look for any loose electrical connectors on the board or to the sensors...one may have come loose.
Posted on Sep 07, 2009
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