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Block heater

5

550Doug

Member
Location
Southern Ontario
I plugged in the block heater on a new toy today (1959 570 Cockshutt) and I think it blew out my GFCI. I dont mean 'tripped', I mean it's gone Kapputs! My yard outlet has been working fine for years and then all of a sudden with this mornings block heater test, its gone. So, is there an easy way to test this block heater without blowing another circuit?
The digital ohm meter (between 2 small prongs of 3-prong plug) seems to bounce around a lot, but never below 1K ohms.
 
1. How "big" is the block heater (Watts)... some GFI's are only rated for 15 Amps and there would be a high inrush current at the instant the (cold) heater is plugged in.

2. NO reason for your Ohmmeter to "bounce around" reading a purely resistive circuit. The heater SHOULD read significantly less than 100 Ohms (cold).
 
I can't help you, you need John T, but I think all that clutch work got to him. But I did want to say nice tractor, throw up a picture if you get a chance.
 
Hello 550Doug,
Your resistance reading on the meter has to be steady or with little fluctuation to be accurate! Your voltage devided by the resistance will give you the amperage draw.
Look for lose connections through the circuit, including the A/C line: receptacle spades, extension cord, or shorted cord.
Guido.
 
Just plug it into another circuit with a good beaker and see what happens, if the gfci blew up it was probably no good! You should have a clamp on ammeter ($9.99 at HF) very handy tool, solves a lot of mysteries!
 
Sounds like your heater may be kaput. A resistance reading that bounces around a bunch usually means there is a poor connection somewhere in the circuit.
 
Here are two cockshutt pics for you: a 540 and a 570

<a href="http://s146.photobucket.com/albums/r268/dgminke/?action=view&current=540Ckst4.jpg" target="_blank">
540Ckst4.jpg" border="0" alt="540 Cockshutt
</a>

<a href="http://s146.photobucket.com/albums/r268/dgminke/?action=view&current=570Cockshutt.jpg" target="_blank">
570Cockshutt.jpg" border="0" alt="570 Cockshutt
</a>
 
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