I'm pretty weak at electric so figured I'd ask here.

The stove goes out overnight. No lights, anything. All the breakers appear in the right spot so, I use a voltage sensor and it says the 220V range outlet is hot, both the top and bottom. So I figure, hey this stove needs a part replaced.

Then two days later the HVAC unit stops working.

The breaker box has the range and HVAC on the same breaker. I pop it off, pop it on, the breaker fights me and pops left. On the second try the breaker stays put.

The range and HVAC are now working. What should I be concerned about in that breaker? This is a three year old house.

Well, I hope a Master Electrician chimes in here soon for a better answer than mine.

Summary
Immediately get an electrician out there and unplug the range, cut back on HVAC use if possible.

Although all this has been working for three years, I wonder if warning signs have been hidden from you until now.

Since before the 80's, never seen one - nor a dual - 220 breaker share with another HVAC, Dryer, Range/CT, etc.

A good way to shorten the life of a HVAC is to share it with a mere 1/2hp septic pump, electricians told me.

Even microwaves have a dedicated 110 circuit

The breaker behavior told means it is over loaded ... why now and not earlier is something for a pro to discover

I assume this is a spec.house, as it would be incredible if a custom build = someone's losing a license.

As for CODEs that I suspect would rule against such an arrangement, again I leave to the visiting pro

Please don't burn up and let us know what happened.

Range and HVAC on same breaker sounds wonky and probably not code on recent construction. That said, sounds like you have an intermittent fault in either the AC unit or range that is tripping the shared breaker.

What size breaker ?


I have never seen a shared 220 circuit and i have worked on 100's houses from new to 100 plus years old.

Is this house in the city limits ?

Definitely put them on separate breakers.

Curious, what size breaker are they on? How do both wires even fit in it?


edit: Like minds, JP76

Mea Culpa, I'm a electric novice and cannot read. My apologies. The range is 5B/7A, the AC is 7B/9A. Different breakers. It's just odd that they both went off within 48 hours.

Could be a bad breaker. I had my HVAC go out and it turned out the breaker was bad - it was in the ON position, but wasn't conducting any juice.

I agree you need them on separate breakers.

Can you take a pic of the panel showing the actual breakers?

I had an issue with my stove mysteriously going off and on randomly while cooking for no apparent reason, however, it never tripped the breaker so I replaced the 240 wall outlet plug and all has been good since. That was about 5 years ago and the home was about 15yo at the time.

Did resetting the breakers ultimately fix the stove and hvac problem?

If it fought back and was actively trying to go left it may have been tripping. Or, sometimes when a breaker trips, it doesn't fully go off. It stops midway and can look still on. To reset it, you have to flip it off completely before it will go on. If yours did that, it would fight you until to flipped it to the left to reset it.

The electrician did the labeling.

Resetting the breakers has fixed the issues. That breaker fought back after turning it off to the left, and then to the right towards on.