immersion heater

[stenti]

if i test across the l - n on immersion sholud i be getting about 20ohms and 0.00 resistance or is it knackered?

 

[ricicle]

With the supply isolated and the meter on resistance you should have a reading of around 20 ohms.
IR readings should be above 1 megohm between the element and earth.

 

[TicklyT]

About 20 Ohms with the thermostat contacts closed is good.
Approaching infinity if the 'stat contacts are open.

You may be able to see the change from about 20 ohms to out of range (or whatever your particular meter displays) as the 'stat switches if you change the temperature setting.

Some thermostats incorporate an overheat cut-off that may require re-setting. It should trip if the thermostat doesn't operate correctly.

 

[stenti]

i've got 20ohms continuity and 0.00 megohms insulation resistance between live and neautral so element should be ok still, wicked

 

[BS3036]

You aren't measuring insulation resistance unless it's between either L or N, and Earth. Actually, I'm not sure what you're really doing anyway. Presumably there's some sort of problem?