If this is a "new" oven there is usually a method of setting up the oven temps for accuracy found in the manual.

If it's a old oven that is now acting up then as broil and bake use different elements and you are suffering loss in both modes I would lean towards whatever temp sensor is responcible.

 

Thanks, Steve. It's an old oven. I will try replacing the sensor this weekend.

 

I think this is the correct part
W10833885

One of the part outlet stores charges $122 for it.

Amazon $60

Amazon.com

Walmart $63

Robot or human?

 

I replaced the sensor and I don't think it made a difference.

Set oven to convection bake at 300. Took about 25 minutes to reach what-it-thinks-is 300 (seems slow to me). ThermPro says 288. I thought this was close enough for a cheap oven. But then it seemed like the element never turned back on. The temperature dropped down to 245 on ThermPro after 15 minutes - meanwhile, the oven display still showing "300".

I then turned off convection and set to regular bake at 300 and put the therm closer to the sensor (instead of middle of the oven) and then it sat at 196 and never went over while the oven still showed "300". During this, the stove would click and then 1 second later click again. Seemed like the element was not staying on?

I then set oven to broil 500. Took about 10 minutes for the oven to beep. And ThermPro showed 449. Same thing as before new sensor.

 

Not sure then, If it's the control board I'd be looking at a new oven.

 

Sometimes appliances just get tired and are ready to be replaced. I cook a lot and consider my self pretty accomplished. An oven that is off temp consistently makes using the oven very difficult. A temperature that is 20 degrees off the setting is significant. If it is always 20 degrees off you can compensate but if I had to measure every time I used the oven, the only DIY tool I would apply is a 30 lb sledgehammer and put that stove out of my misery. It sounds like you have temperature control issues (thermostat) and heating element issues. Those can all be replaced. Look at the seal around the door as well.

 

Hey Matt, I'm having the same issue with my Whirlpool. Wondering if you ever found the cause and a fix?

 

You're better to start you own thread, but . . .

If is just off the set point, there is a process in the owner's manual how to adjust (in the old analogue days it was usually a small screw in the control knob).

We had a problem with our WP from new where it would not hold a temperature and it took a couple of techs and couple visits plus consulting while WP tech support to somehow calibrate the appliance (I don't know what they did).

Many ovens pre-heat slower now to give them higher Enerstar ratings; many don't use both elements now.

 

I am having this issue. Replaced the sensor, but oven is not maintaining the set temperature. It does seem to take longer to heat, but it does reach the set temp. What else could be the problem? Thank you.