Why doesn't oven work?

Pump is working but no power to heater may be caused by
the two circuit breakers that protect the electrical circuits providing power to the air handler and heat pump condenser may have tripped Check both the main electrical panel and any sub panels that supply power to the unit. If a circuit breaker has tripped, reset it by flipping it to OFF and then to ON.
If the circuit breaker trips again, there is probably a short in the electrical system providing power to the furnace. Call an electrical contractor

Check the circuit breaker in the power panel. It will be two breakers with their handles joined One of them has tripped internally. This removed 220 but not 110 for the clock and light. You can try resetting the breaker, but if it tripped internally, then best practice is to replace it.

power to the unit by removing one or more fuses or tripping one or more breakers at the main entrance panel or at a separate panel. If the range is fused at a separate panel, this panel may be located adjacent to the main panel or in a basement, crawl space, or other location. If there is a grounding wire to the range, disconnect it. Make sure the power to the unit is off.
Servicing FusesIf the range or oven is receiving power but doesn't work, the unit may have its own fuse or circuit breaker assembly. This assembly is usually located under the cooktop of the range. In some units, lift the top of the range to gain access to the fuse assembly; or lift the elements, remove the drip pans, and look on the sides of the cabinets. Inside the oven, look to the back to spot the fuse assembly.
If the unit has this additional fuse or breaker system, components such as the oven light, the range heating elements, the timer, and a self-cleaning feature may be separately fused.
If these components or features fail to work, don't overlook the possibility that the fuses have blown. To replace a blown fuse, unscrew the old fuse and install a new one of the same type and electrical rating. If the unit has circuit breakers, push the breaker or reset button, which is usually located on the control panel.

What is the complete model number of your unit?

If it is an electric stove it may have tripped one side of the 230 line. Check the house cuircuit breaker panel and find the stove circuit breaker. It will be tied together by a bar or clip. Shut off both breakers completly and reset them back completely. If it is a power problem this should reset the stove.

Hi Ron - From what you have described if neither the burners nor oven turns on make sure the electrical connecting is 240V. The oven light and clock portions only required 115V. The clock and oven light working may indicate an electrical circuit breaker supplying the range is tripped or a fuse is blown. Confirm household circuit is correct and the range cord is properly wired to the terminal block.

If the fuse or circuit breaker is tripping it is most likely a short circuit in the oven element.

Check your main breaker in the fuse panel, it may be partially tripped. Turn the 40 amp breaker off and back on. if the display does not return to the stove, the I would suggest you contact a local servicer.

Morison,
The same thing happened to me about a week ago. I was preheating our electric oven, heard a very loud bang/pop. Checked and the oven had PF (power failure) I went downstairs and the breaker was tripped. Came back upstairs and to look at stove, the burners are working fine so I continued to preheat oven after a half an hour the oven was only slightly warm. Did you ever find out what was wrong?

1 Check to be sure unit is properly connected to power supply. 
2 Check for a blown circuit fuse or a tripped main circuit breaker. 
3 Check to be sure ignitor is dry and clicking. Burner will not light if ignitor is damaged, soiled or wet. If ignitor doesn’t click, turn control knob OFF. 
4 Burner ports may be clogged.