Redring AE115, AE125 manual PowerStar, Water Temperature Too Hot, Water Temperature Fluctuates

	Water Temperature Too Hot
Temperature dial	Turn the temperature knob located on the bottom of the water heater
set too high	counterclockwise for cooler temperatures.
There are	Obstructions in the water path can restrict the flow of water through the heater
restrictions in the	causing overheating. Verify the heater’s inlet filter screen, faucet aerators,
plumbing	showerheads and whole house filters are clear of debris. Verify proper flow on the
	outlet side of the heater with the hot water pipe disconnected. Opening hot water
	isolation valve fully may be necessary. Maximum flow rates for each unit are as
	follows. AE115 - 2.3gpm, AE125 - 3.5gpm.
Inlet water	Verify the heater is being feed with cold water only. This water heater is not
temperature is too	designed for preheated water or recirculation applications. Increase flow rate
warm	where ever possible. Replacing low flow showerheads and aerators with higher
	flowing (GPM) ones may be necessary.

	Water Temperature Fluctuates
Cold mix, heater	If inlet water temperature is over 70°F, water may be very hot out of the tap. This
deactivates	requires a lot of cold water to be added in order to get a usable hot water
	temperature. The addition of too much cold water will overpower hot water
	demand from the water heater. This slows the flow within the water heater,
	decreasing it below the activation point, which shuts off the heater. The end result
	is nothing but cold water coming out of the outlet. Increase the flow rate by
	cleaning or replacing fixtures and lower the setting on the temperature adjustment
	knob. See service bulletin TWH-E2-04 at www.boschhotwater.com for further
	troubleshooting on this symptom.
Fluctuating water	If the water pressure in the home is erratic and the water flow is not consistent
pressure	while a tap is opened, then the temperature of hot water will fluctuate. The
	minimum water pressure for the home should be 30psi or greater. For people on
	well systems the minimum pressure range is 30-50psi. The use of a pressure
	reducing/regulating valve is an effective way to maintain constant water pressure
	to the water heater. Watts brand 25AUB- ¾” or N35B-¾” pressure
	reducing/regulating valves or equivalent is suggested.
Changing flow rate	Major changes in flow rate can adversely affect the output water temperature of
	the heater. Increases from one major fixture running to multiple fixtures running at
	one time can cause the temperature to fluctuate. Stay within the heater’s
	specifications. See Graph 1 on page 8.

PowerStar

LIMITED 10 YEAR WARRANTY

COVERAGE

BOSCH WATER HEATING (herein after BBT) guarantees this water heater to the original owner of the water heater at the original installation location against defects in material and workmanship for the periods specified below.

WARRANTY PERIOD

1.The Heating Modules – If the original heating module leaks or fails within ten (10) years from the date of original installation of the water heater because of a defect in material or workmanship, BBT will furnish to such an owner a replacement heater of the then-prevailing comparable model.

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