Fault finding electrical problem. Failed element?

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Fault finding electrical problem. Failed element?

Unread postby Jeltz » Sat Mar 02, 2019 10:52 am

I have the original BM20, its blowing a fuse when used. If I run it manually it will run the pump fine but running the heat blows a fuse within a minute or 2 but not immediately. Before I order a replacement element is there anything else I should be looking at?
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Re: Fault finding electrical problem. Failed element?

Unread postby mashy » Sat Mar 02, 2019 1:50 pm

You could test the element, but you need to a mega to be sure.

Sounds like an element to me.
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Re: Fault finding electrical problem. Failed element?

Unread postby johnrm » Mon Mar 04, 2019 5:23 pm

Multimeter
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Re: Fault finding electrical problem. Failed element?

Unread postby Runningman » Mon Mar 04, 2019 11:55 pm

Multimeter will check for continuity and it will definately let you know if your element has blown
regards
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Re: Fault finding electrical problem. Failed element?

Unread postby mashy » Tue Mar 05, 2019 5:19 am

A multimeter will not be definitive.

I have had failed elements look OK with a multimeter.

https://www.espares.co.uk/advice/carean ... ty-element
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Re: Fault finding electrical problem. Failed element?

Unread postby Runningman » Tue Mar 05, 2019 2:33 pm

With all due respect Mashy. Apply Multimeter across both ends of the element. No continuity means break somewhere in element. Goosed.
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Re: Fault finding electrical problem. Failed element?

Unread postby mashy » Tue Mar 05, 2019 10:50 pm

Yes but that can give you a contact but still the element is faulty and will trip. Been there pie - hat - video etc...

What I am saying is a multimeter is not an absolute test.
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Re: Fault finding electrical problem. Failed element?

Unread postby chastuck » Wed Mar 06, 2019 1:14 am

A multimeter will tell you all you need to know about an element, along with Ohm's law. For instance, you know the voltage is 230V and you know the wattage of the element is 3000 watts. Ohm's Law (Voltage squared divided by the watts) tells you the resistance of the element in this case will be around 17.6 Ohms. If it isn't the element is faulty.
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Re: Fault finding electrical problem. Failed element?

Unread postby mashy » Wed Mar 06, 2019 8:02 am

Does a multimeter test insulation?
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Re: Fault finding electrical problem. Failed element?

Unread postby johnrm » Thu Mar 07, 2019 7:07 am

Sweet Jesus.

Thermal or electrical?
Continuity/resistance from core to outer surface.
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Re: Fault finding electrical problem. Failed element?

Unread postby mashy » Thu Mar 07, 2019 9:02 am

'sweet Jesus' covered it nicely LOL.

Different strokes for different folks. Lets leave it there.
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Re: Fault finding electrical problem. Failed element?

Unread postby Sandedk » Sat Mar 23, 2019 5:03 pm

You must use a 500V insulation tester. A multimeter is no good.
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Re: Fault finding electrical problem. Failed element?

Unread postby mashy » Sun Mar 24, 2019 6:12 am

Thank you Sandedk

A basic way that does prove it.
Make a short mains test lead.
Wire the element to that.
Power on the 3 seconds NO more.
Is the element hot?
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Re: Fault finding electrical problem. Failed element?

Unread postby Bigstew » Sun Apr 07, 2019 3:01 pm

Mashy is right, my multimeter said the elemnt was Ok. Did a direct feed and sod all. New elemnt is working fine.
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Re: Fault finding electrical problem. Failed element?

Unread postby Fliegende Gans » Thu Apr 25, 2019 10:43 am

Another tip...make sure all the connections in plugs and sockets are ok. They do work loose believe it or not.
My BM 50 was giving a poor boil and I found the neutrals had burnt out in the consumer box where the cb's where located!!
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