AGA main PCB (TEK/Tekelek) failure
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
- Recurring relay or triac codes after component replacement
- Watchdog faults 002 / 006
- VE code — firmware too old
- Multiple zones behaving erratically
Likely causes
What is usually behind it
- Relay short circuit (110–116) or open circuit (150–156) recurringcommon
- Triac fault (130–136) with a good element and correct firmwarecommon
- Firmware below 6.1 with a newer user panel (VE)occasional
Diagnostics
How a technician diagnoses it
Our technicians follow the factory diagnostic path for this fault.
- 1Rule out the element and thermocouple first — most triac codes are element faults, not board faults.
- 2Check firmware version on the TEK Vision Firmware tab.
- 3Always do a mains voltage and polarity check: the TEK PCB will not work with reversed polarity.
- 4Replacement is a complete PCB tray: remove the magnetic plinth, remove two screws each side of the tray, pull the tray out, transfer all cables in the correct order and torque to spec.
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.
Fault codes
Related error codes
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.