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Ariston water heater resources

Ariston thermostat

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Bosch Ariston GL 2.5 gallon 4 gallon 8 gallon

How to install under counter water heater

Ariston components

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Element and anode rod

Tank is steel since unit has anode rod

Ariston water heater parts at Amazon

How to test water heater elements
More about water heater anode rods

Element and anode rod


1. Make sure the power supply is on and working.

2. If light does not come on, check that the reset button is pushed in; follow steps from previous section.

3. If the indicator light works properly but temperature does not get hot a tap, test for a plumbing crossover; shut off cold supply to heater and open hot water tap. There should be no water flowing. Any continued flow indicates a crossover which will effect the temperature and will need to be corrected.

4. Call a qualified service technician to test the resistance of the heating element (8-10 ohms). Heating element should be replaced if readings are outside these values."

Water does not get hot

How to test water heater element

1. If the light does not come on, but water gets hot, check for faulty bulb.

2. Check reset button; follow steps from previous section.

Light does not come ON

1. Brown or rusty water indicates a “spent” anode rod. Replace anode rod.

Sacrifical anodce rod depletes over time

Brown water
More about anode rods

1. Smelly water could be due to an unusual reaction between local water and the

heater’s anode rod. Check anode rod (see previous section on anode rod).

Smelly water

1. Remove cover plate and turn the temperature selector dial (D Fig. 4) counter

clockwise to lower temperature. If temperature never lowers then replace

thermostat. (see manual).
Water is too hot

1. clean sediment out of tank using shop vac and piece of garden hose

2) Clean element with white vinegar or replace element.

More about sounds

1. Adjust the temperature selector dial (D Fig. 4) clockwise to increase temperature

2. Replace thermostat

3) Check if line has 80% rated voltage.

4) Check if single-handle faucet has bad cartridge = crossover

5) Clean sediment out of tank

Water not hot enough
Clean sediment

1. Check water fittings and T & P fitting on top of tank.

2. Remove front cover and inspect heating element gasket.

3. If tank is leaking call Bosch Water Heating for warranty claim if still within warranty


Leaking water heater
More about leaking water heaters
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