# One cooking zone on an electric AGA is dead or the zone lights flash rapidly

> One cooking zone on an electric AGA is dead or the zone lights flash rapidly: symptoms, likely causes and how a technician diagnoses it. Common AGA issue. Mon–Sun 8:00AM–8:00PM. Call or text 206-427-7323.

Common issue — here is how we diagnose it, which parts are usually involved, and when to call a pro.

**Common** · Professional repair only

## What you will notice

- A single oven or hotplate never heats
- Zone display lights flash rapidly
- An error code appears on the customer's panel or handset
- Zone was working then permanently disabled itself

## What is usually behind it

- Element open circuit on that channel (triac fault reported) (most common)
- Thermocouple open circuit or differential fault (common)
- Main TEK PCB relay or triac failure (less common)
- Blocking error that escalated to a lock after four occurrences in 24 hours (context)

## How a technician diagnoses it

1. Get the error code from the customer BEFORE attending.
2. Isolate the supply and test for safe electrical isolation.
3. Connect TEK Vision with interface key AE4M280824 and read both the temporary fault log and the permanent fault count. Save the fault-count log to file.
4. For a 130–136 triac code: check the element connections at the terminals for that channel and measure element resistance — expect 18–22 ohms. Open circuit = replace the element.
5. If the element measures correctly and the firmware version is correct, replace the main PCB.
6. After repair, reset the PCB with the reset button (hold until 'system reset' appears); mains cycling will not clear a lock.

> ⚠️ **Safety first:** 240V, 30A supply. Isolation and proven-dead testing mandatory. Torque all electrical connections to spec (14-way terminal block: 0.8 Nm initial, 0.6 Nm retighten; oven element sub-assembly 2 Nm).

## Parts usually needed

- [AGA oven element (eR7, 2.5 kW rectangular)](https://aga.repair/aga-oven-element-replacement) (heating)
- [AGA boiling / simmer plate element](https://aga.repair/aga-hotplate-element-replacement) (heating)
- [AGA main TEK / Tekelek PCB (complete tray)](https://aga.repair/aga-tek-pcb-replacement) (control)
- [AGA duplex thermocouple (eR7 platform)](https://aga.repair/aga-thermocouple-replacement) (sensor)

## Related error codes

- [130-136 — Triac fault](https://aga.repair/aga-error-code-130-136)
- [110-116 — Relay short circuit](https://aga.repair/aga-error-code-110-116)
- [150-156 — Relay open circuit](https://aga.repair/aga-error-code-150-156)
- [060-100 — Thermocouple open circuit](https://aga.repair/aga-error-code-060-100)
- [020-024 — Thermocouple differential — the two thermocouples in a zone disagree](https://aga.repair/aga-error-code-020-024)

## Appliances affected

- [AGA Classic eR7](https://aga.repair/aga-classic-er7-repair)
- [AGA Classic 39" Total Control](https://aga.repair/aga-classic-total-control-repair)
- [AGA ERA](https://aga.repair/aga-era-repair)

> ⚠️ **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.

## Related AGA problems

- [AGA oven door rope seal worn — heat loss, poor cooking, hot fascia](https://aga.repair/aga-door-rope-seal)
- [AGA oven or hotplate element failed (no heat / reduced heat)](https://aga.repair/aga-element-open)
- [AGA full power time-out (codes 010–014) — zone too slow to reach temperature](https://aga.repair/aga-full-power-timeout)

## 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.

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## Book a repair

- Call or text: 206-427-7323 (Mon–Sun 8:00AM–8:00PM, Pacific Time)
- Book online: https://aga.repair/contact/
- Email: service@aga.repair
- Service at your home across the Seattle–Tacoma metro, WA. Diagnostic fee applies toward your repair.

Independent service company — not affiliated with or authorized by AGA / AGA Rangemaster (Middleby). We repair out-of-warranty AGA appliances.