Odd Oven Problem

E

elementfe

Joined
May 3, 2008
Messages
1,436
Here's a strange one... something fell on the cord for my oven and there were some sparks from the plug. Turned out a wire in the plug got pulled part way out and burned.
Scary, but no damage to humans.
Fixed the plug, but here's the weird thing: now I've got current to the coil (119V at each end to ground), there's continuity from one end of the coil to the other, thermocouple tests OK to the best of my knowledge....but the coil isn't warming up.
Any guesses why?
I'm wondering if one of the SSRs could be out, since voltage from the coil to ground is 119 instead of 200+, but wouldn't the coil heat up a little?
Thanks for any ideas!
 
Check the voltage from one end of the coil to the other. I suspect it will be zero. 240vac is made up from two 120vac phases a 180° apart. If you open one line you will read 120vac (to ground) on both ends of the coil. This is because you have an open circuit on one end. No current flow, no voltage drop across the coil, so you read the same voltage on each end, with reference to ground.
Jim A.
 
I suspect a wire is not connected right or one is broken. Each hot wire from the cord at the controller should read 120VAC to ground, and 240VAC from one leg to the other. If that is good, look for a blown fuse in the controller.

I assume you fully reset the circuit breakers … both of them if the circuit is running on twin 120 legs.
 
You either have an open circuit due to the wiring, or you have a faulty SSR.

You presumably have a multimeter, since you have measured the element Voltage at 119V.

Unplug the oven so you have no power and therefore no danger. Switch the multimeter to Ohms and measure between the outputs of both SSRs (the terminals that connect to the element). If you have an Ohms reading (probably something "around" 12 Ohms for a 240V, 3 kW element), the wiring is OK and the most likely problem is an SSR. If you are showing open-circuit or a much higher Ohms reading, there is probably a break in the wiring.
 
Thanks Stacy-
No output from one of the two SSRs, even though the red LED on each SSR is lit- replacing both.
Like so many problems, troubleshooting is fairly obvious in hindsight, easy to miss what's in plain sight.
 
"since voltage from the coil to ground is 119 instead of 200+,"
Fwiw, Household power in USA, You wont ever get 240V between ground and an energised conductor. (assuming nothing wrong on the Utility Co. side.)

Btw, Greetings from Lopez.
 
Lieblad said:
"since voltage from the coil to ground is 119 instead of 200+,"
Fwiw, Household power in USA, You wont ever get 240V between ground and an energised conductor. (assuming nothing wrong on the Utility Co. side.)

Btw, Greetings from Lopez.
Click to expand...
Yeah, duh...it's amazing how the brain can forget the most basic principles when out of practice...You're just across the water from me? I'm on Guemes if that's not already on my profile.
 
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