Miele Wall Oven Repair in Toronto — Not reaching or holding temperature (uneven baking)

• Element open-circuit is the signature not-reaching-temp fault on Miele H-series wall ovens, and the platform splits it by heat path: F21 flags the grill/broil element and F22 flags the fan-forced ring element. An oven that bakes but won't come up in convection, or browns but won't broil, points at one element, not the control. The upper/broil element is OEM 05813182 (confirmed Miele USA / Reliable Parts / Part Advantage / Sears PartsDirect, listed as 'Heater element Oberhitze 208V') and the 2500W fan-ring convection element is 2109812 (Miele 20.21693.000) — each heat circuit is metered for continuity independently before anything is condemned.
• F5/F6 are the PT1000 temperature-sensor codes and are the most common reason a Miele oven drifts off setpoint, bakes cold, or never closes the loop to temperature: F5 reads the PT1000 short-circuited, F6 reads it open. The correct probe is Miele PT1000 5730712 (listed on Miele USA). A PT1000 reads ~1000 ohms at 0C and roughly 1097 ohms at room temperature (per the IEC 60751 PT1000 curve); an open reading or a value well off that curve means the board is being fed bad temperature data, so we meter the probe before ordering the part.
• F23 is the not-reaching-temp code unique to the self-clean path: the pyrolytic cycle could not reach its target cleaning temperature (Miele publishes this as roughly 400C+ / ~750F+) within the allowed time and quits early. Miele's own first remedy is to clear coarse soiling and re-run, because baked-on grease acts as a thermal blanket and starves the cavity of heat — but a clean cavity that still throws F23 shifts the diagnosis to a weak pyro element or a PT1000 (5730712) feeding low readings, in that order.
• F60 is a ventilation fault, not an overtemp trip, and it presents as an oven that derates or won't hold heat because the cooling fan isn't spinning or the air duct is blocked/covered. Miele's documented remedy is customer-actionable: clear the air duct, power-cycle (disconnect and reconnect power), and confirm the cooling fan turns when the oven heats — we run that check before suspecting the fan motor or wiring, which keeps an airflow nuisance fault from being misread as a dead element.
• F04 is an electronic-control-board fault on Miele ovens (the relay that switches the elements is the technician-level suspect within that board), so the cavity stays cold even though the display, light and fan run normally. This is condemned last, by elimination — after the elements (05813182 / 2109812) read good on continuity and the PT1000 (5730712) meters in range — because a no-heat oven with healthy elements and a healthy probe is the case where the control board is the remaining suspect.
• A field condition that mimics a Miele element failure on these hardwired ovens is loss of one supply leg (commonly L2): the panel still lights from L1 so the oven looks alive, but with only one leg present the cavity can't reach temperature. We verify both legs at the terminal block and confirm a dedicated circuit before touching any Miele part — a tripped/loose breaker leg has stranded more than one oven that was about to get an unnecessary element.

Miele not reaching or holding temperature (uneven baking) in Toronto — the local specifics

• The recurring Toronto pattern on Miele not-reaching-temp calls is two-sided: out-of-warranty H-series ovens that drift cold or undershoot setpoint and meter back to a PT1000 sensor (F5/F6) or a single dead heat path (F21 grill / F22 fan-ring), and a steady trickle of F23 'pyro won't reach temperature' calls that turn out to be a heavily soiled cavity rather than a failed part — cleared by clearing the soil, not by selling an element. We also see the L2-leg / loose-breaker no-heat mimic often enough that a both-legs check is standard before any quote.
• To these calls we carry the meter-and-confirm kit plus the OEM-channel-sourced parts that fit the fault: PT1000 temperature sensor 5730712, upper/broil element 05813182 and 2500W fan-ring convection element 2109812 (each verified to the model/serial before the truck rolls). Control boards for an F04 fault are factory-order, so when diagnosis points there we set the expectation and lead time rather than promising a same-visit fix.

For the full Miele wall oven module — every fault, part number and code — see Miele wall oven repair in Toronto, and for the same fault across all brands the wall oven not reaching or holding temperature (uneven baking) guide.