# AGA configuration key fault (code 140)

> AGA configuration key fault (code 140): symptoms, likely causes and how a technician diagnoses it. Rare AGA issue. Mon–Sun 8:00AM–8:00PM. Call or text 206-427-7323.

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

**Rare** · Professional repair only

## What you will notice

- Code 140
- Cooker will not run after a PCB replacement

## What is usually behind it

- No configuration key fitted to the board (most common after board swap)
- Wrong key for the phase of electrical supply (common)

## How a technician diagnoses it

1. Confirm a configuration key is fitted to the PCB.
2. With the controls in standby, display the configuration key against the connected phase supply to confirm they match. See technical bulletin TB 30.01.14.

## Parts usually needed

- [AGA PCB electrical supply configuration key](https://aga.repair/aga-config-key-replacement) (control)

## Related error codes

- [140 — Configuration key fault](https://aga.repair/aga-error-code-140)

## 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)

> ⚠️ **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.