AGA R7 oven running hot or cold (oven thermocouple / PCB control)
Occasional issue — here is how we diagnose it, which parts are usually involved, and when to call a pro.
- Occasional
- Professional repair only
- Cast Iron Range
Symptoms
What you will notice
- Roasting or baking oven off target
- Ovens not stabilising
Likely causes
What is usually behind it
- Oven thermocouple failed or mispositionedmost common
- Main PCB faultless common
Diagnostics
How a technician diagnoses it
Our technicians follow the factory diagnostic path for this fault.
- 1R7 oven targets: roast approx. 230 °C / 446 °F, bake approx. 175 °C / 347 °F, slow cook approx. 115 °C / 239 °F.
- 2The oven thermocouple and overheat thermostat phials are mounted in the roof of the roast oven — remove the phial location bracket to replace.
Safety & DIY disclaimer
Guides on this site are for information only. Appliance repair involves 240V electricity, gas connections, refrigerant and heavy cast-iron parts — anything you do yourself is at your own risk and can damage the appliance or cause injury. The safe option is to book a qualified technician.
Parts
Parts usually needed
We confirm the failing part with diagnostics before replacing anything.
Coverage
Appliances affected
Keep reading
Related AGA problems
Frequently asked questions
Can I fix this myself?
Professional repair only. This fault involves gas or 240V electrical components — diagnosis and repair should be done by a licensed technician.
How much does it cost to fix this issue?
Every visit starts with diagnostics and a written estimate — the diagnostic fee applies toward your repair when you proceed. We never start work without your approval.
Not sure? We diagnose first.
Book a diagnostic visit — you get a written estimate before any work, and the diagnostic fee applies toward your repair.
Mon–Sun 8:00AM–8:00PM
Independent service company — not affiliated with or authorized by AGA / AGA Rangemaster (Middleby). We repair out-of-warranty AGA appliances.