Start with the sequence
For this Diplomat cooker complaint, note which oven or grill is affected and which functions still work. Record the last normal stage and the first change. A short description of that sequence is more useful than a guessed part name.
What might explain it?
One cooking cavity will not heat can involve an element, temperature control or mode selection. Those are possible areas for assessment, not a confirmed diagnosis or a claim about a particular Diplomat model.
Compare the selected setting with the result you actually observed. Mention whether other functions on the same appliance still operate. Avoid repeated resets, bypassing locks or testing internal components.
The Diplomat identification matters
Find the rating plate only where safely accessible. State electric, gas or dual fuel and single, double or range format.
This may be an older installed appliance. Keep every number on its plate and any original paperwork. Enquiry guidance does not confirm current production or available spare parts.
A display code only has meaning alongside the exact product and its documentation. Photograph the full message rather than looking up a similarly named model and assuming it uses the same code system.
Before a visit for this complaint
A cooker can contain several independent cooking systems. Tell us which oven, grill or hob section is affected.
Give the full address postcode, not just Catford or SE6. Appointment availability, the repair approach, charges and any parts requirement are confirmed individually.
A useful next step
Prepare the Diplomat model and your observations about “one cooking cavity will not heat”. Our Diplomat cooker guide explains the other complaints and fitting details for this appliance. You can also use the AI fault finder or SI guided questions before making an enquiry.
Your repair notes
This notepad stays in this page. Copy it before opening the secure booking service; notes are not sent automatically.