On Wednesday we had new appliances delivered to the house. The installation was included in the purchase price so I let the retailer (not a big box but a well known and regarded local appliance shop) install everything. We have a double wall oven (JennAir) that was replacing a 14 year old Maytag double wall oven. The old oven and the new oven require 240v.
I chatted with the guys doing the installation on Weds morning and then headed to work. When I got home everything looked great, as directed by the installer, I was to turn the oven to bake at 350 for one hour to burn off some of the coatings put on the oven out of the factory. All works fine – oven has power, lights, etc. But no heat. Zilch – no bake, no broil.
Fast forward to today and I've since pulled the oven out of the wall and I'm not registering 240v, I'm getting 125v. My guess is that the oven is fine but that it's not getting enough power to heat. My hope is that this isn't an issue with the wiring but I'm really struggling with another reason – everything was fine with the old oven which arguably drew more power. Could it be the junction box connection? (I wasn't able to get the oven out far enough to check the connections) Perhaps a bad breaker?
Best Answer
There are some good questions here in the comments of your post.
One thing you did not mention was the 125V measurement how that was taken from what to what.
So lets assume you have a 3-Way or a 4-Way hookup, you should have L1, L2, Neutral and if you have a 4th wire it will be the Ground.
Measuring
L1 to Neutral 125 VAC L2 to Neutral 125 VAC L1 to L2 240 VAC L1 to Ground 125 VAC L2 to Ground 125 VAC
Neutral to Ground ~0 to .5 VAC.
Now you do not mention what the installers did - replace wiring or Circuit Breaker or leave the old breaker?
You should measure your voltage at the Breaker there should be a single or a ganged breaker that is for L1 and L2 - you should measure your voltage on the breaker terminals to see if you have proper voltage right after the breaker (seeing as you did not have it at the oven ???? ).
1: if you have voltage - turn the oven on and measure the voltage - if the voltage drops you have a bad breaker.
2: if you don't have voltage - you have a bad breaker.
3: If you have voltage at the breaker and while the oven is on as well - verify your wiring connections at the breaker, that they are tight. Then verify the neutral and ground connections are also tight. After this you will need to go to your oven and check the connections at the oven to make sure they are properly connected in a manner appropriate for your ovens connections.
4: If after these steps you still have no voltage - you have a wire break between the service panel and the oven.