DIY Series 109: Repair Ariston Water Heater (FE-3624ESP)

Repair Ariston Water Heater (FE-3624ESP)

Symptoms: 

• Upon power on, the ELCB (Green LED) is ON, but the Power (Red LED) is OFF. 
• The water flow out is not warm / hot at all. 

Analysis:

• The water flow sensor (magnet) was rusted and cracked, causing intermittent connectivity to Reed Switch when water flow in.
• The Power Supply Board having a bulging capacitor (400V, 68uF, 105°C), and the lead at the bottom having signs of leaking.
• After fixed the magnet sensor and the bulging capacitor, if the Power (Red LED) is still OFF, press RESET button (Caution: Do it only when the water heater is power off) on the thermostat (located on top of the heater tank) to resume the operation of water heater.

Photos:

1. Ariston Water Heater
2. Ariston Model FE-3624ESP
3. After dismantling the front cover
4. Location of the flow sensor (magnet) and Reed Switch
5. Universal magnet sensor (replacement)
6. Location of the Power Supply Board
7. Bulging capacitor
8. Leaking at the capacitor
9. Reset the thermostat (if needed) at the top of heater tank 

 

Tools required:

• Screwdriver
• Multimeter 
• Soldering Tools

Costs involved:

• Flow sensor (magnet): ~US$2.50
• Capacitor (400V, 68uF, 105°C): US$1.00 ~ US$2.00