Hi my night time immersion heater has packed in and i don't know weather it is the element or the stat there is definitely power there so it is not that,can anyone tell me how to test them i have a multimeter. thanks
Immersion heater
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Firstly switch off all power at the mains.
Switch your multi-meter to the lowest ohms range.
Remove the fuse (if fitted), and check that its resistance is around zero.
Remove any covers on the heater to reveal the connections.
Connect the multi-meter across the large terminals on the heater (not the earth connection). The meter should read a low value, something like 10 to 20 ohms. If the meter read a very high value, or indicates overload (OL) the heater is faulty.
Repeat the procedure for the thermostat. In this case (assuming the water is cold) the meter reading should be zero. If it's high, then the stat is faulty.
HTH
Switch your multi-meter to the lowest ohms range.
Remove the fuse (if fitted), and check that its resistance is around zero.
Remove any covers on the heater to reveal the connections.
Connect the multi-meter across the large terminals on the heater (not the earth connection). The meter should read a low value, something like 10 to 20 ohms. If the meter read a very high value, or indicates overload (OL) the heater is faulty.
Repeat the procedure for the thermostat. In this case (assuming the water is cold) the meter reading should be zero. If it's high, then the stat is faulty.
HTH
With your meter connected to the 'stat, turn the temperature adjustment to minimum and maximum. You should see the 'stat switching on and off.
Immersion heaters now incorporate overheat cutouts that require resetting manually if they trip, often by pressing in a button until it latches. For the immersion to work, the cutout (if fitted) should show continuity when tested with a meter.
Immersion heaters now incorporate overheat cutouts that require resetting manually if they trip, often by pressing in a button until it latches. For the immersion to work, the cutout (if fitted) should show continuity when tested with a meter.
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