Kenmore 790 4558 oven not heating — second hand purchase self installed

Use only checks that match the exact appliance or system and its official guide.

1. Check 1

   With the range cool and untouched, photograph the entire rating plate and record the full model number, serial information, market, and whether the plate identifies electric, gas, or dual-fuel operation. Note separately whether the clock is steady, whether the control responds, whether every surface heater is cold, and whether both Bake and Broil stay cold.

   Expected result: The plate supplies a complete model and fuel type, or only 790.4558/790 4558 is visible; the clock may be stable while the controls, surface heaters, Bake, or Broil behave differently.

   Next step: Use only the matching Kenmore manual once the full identity is available. If the suffix or fuel type cannot be confirmed, keep the advice at this safe symptom level and do not choose a part or diagnostic key sequence.

   Why this matters

   Why: A complete identity is needed for the correct manual and for distinguishing an electric supply path from a gas or dual-fuel path. The scope of the cold functions determines whether this is a whole-appliance supply symptom or a single heating branch.

2. Check 2

   From a normal standing position, select the documented Bake or Broil function and temperature, verify the clock is set, and check only the visible control state for Lock, Delay Start, Sabbath, or a self-clean lock if the exact manual says the model has one. Do not reach behind the range or open it.

   Expected result: The control accepts a mode and temperature and shows an active request, or the display remains unresponsive, locked, or returns to an idle state while the oven stays cold.

   Next step: Correct only a clearly documented control-state issue. If the clock remains on but no heating function starts, continue with external observations and installer verification rather than repeatedly resetting or opening the appliance.

   Why this matters

   Why: A setting or lock can inhibit an otherwise powered oven, but a responsive display does not establish that the heating supply is complete. An unresponsive control is a separate control or supply symptom, not evidence for a particular board.

3. Check 3

   Without opening a breaker panel, moving the range, removing a drawer, or touching a connection, look only at any already-visible plug, cord, receptacle, and appliance exterior for looseness, scorching, melted material, moisture, or impact damage. Have the installer or a qualified electrician verify the complete 240/208-volt range supply and installation; the homeowner should not make a live test.

   Expected result: The visible exterior is normal and the installer confirms a complete supply, or there is a trip history, a damaged cord or receptacle, an uncertain self-installation, or no professional supply confirmation.

   Next step: Keep the range off and arrange electrician or installer assessment when supply is uncertain, protection has tripped, or any damage is visible. Do not pull the range out, remove covers, open the terminal area, or repeatedly re-energize it.

   Why this matters

   Why: Official electric-range guidance says partial supply can leave the clock working while burners do not heat, and identifies voltage or cord problems as installation issues. A clock alone therefore cannot clear the supply. A visible burn or an uncertain installation raises an electrical hazard rather than identifying an oven component.

4. Check 4

   After a qualified person has confirmed the installation and supply are safe, compare one surface-heating request with Bake and Broil using the exact manual, observing from outside for normal response. Do not touch an element, remove a panel, or continue a test if there is smoke, smell, arcing, uncontrolled heat, or a repeated trip.

   Expected result: All surface heaters and both oven modes remain cold, one oven mode is cold while another heats, or a surface heater works but the oven does not.

   Next step: Keep the appliance off and give the technician the exact model, supply verification, affected modes, and any display behavior. Do not order an element, sensor, or control board solely from 790.4558.

   Why this matters

   Why: If every heating function remains cold after supply is confirmed, the fault is inside the appliance or its controls but no specific part is proven. If only one function fails while others heat, the symptom is narrower and the complete model manual can guide a technician's model-specific diagnosis.

5. Check 5

   If the rating plate identifies gas or dual-fuel operation, observe only the normal surface-burner and oven behavior from a safe distance and check for gas odor before any use. Do not attempt to light an oven, inspect a gas connection, or move the range while an odor or abnormal flame is present.

   Expected result: Gas odor, delayed ignition, a yellow or unstable flame, or no oven heat with surface burners working is present, or the plate confirms an electric range instead.

   Next step: For gas odor or an unsafe flame, leave the area and contact the gas supplier or emergency services from outside. Otherwise arrange qualified gas-appliance service and use the exact fuel-specific manual.

   Why this matters

   Why: Gas and dual-fuel appliances have a different hazard and ignition path; the electric 240/208-volt symptom cannot be transferred to them. Gas odor or abnormal flame is a safety event, not a reason to test an igniter or regulator.