# Range oven thermostat Replacement

> Range oven thermostat: failure signs, how it is tested, which AGA series it fits and OEM part numbers. Supplied and installed at your home. Mon–Sun 8:00AM–8:00PM. Call or text 206-427-7323.

Failure symptoms, diagnostic tests, fitment and part numbers — supplied and installed at your home across the Seattle–Tacoma metro, WA.

**Control** · Very common · Viking-platform part

## Signs this part is failing

- Calibration drift — oven getting hotter with age
- Failed closed
- Phial displaced from its spring clips

## How it is tested

If turning the knob down only helps briefly, replace the thermostat.

## Series this part fits

- [AGA Elise](https://aga.repair/aga-elise-repair)
- [AGA Legacy](https://aga.repair/aga-legacy-repair)
- [AGA Mercury](https://aga.repair/aga-mercury-repair)
- [AGA Professional](https://aga.repair/aga-professional-repair)

## Replacement notes

Elise/Mercury 48" has TWO oven thermostats, both under the gas hotplate. LH removed from the rear; RH removed from the top of the RH oven. Both require fascia and gas hotplate removal. The phial sits behind the oven fan baffle plate held by two spring clips.

> ⚠️ **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.

## Problems this part solves

- [Range oven temperature drifting — running hotter or cooler as the range ages](https://aga.repair/aga-range-oven-temp-drift)

## Frequently asked questions

### How do I know the Range oven thermostat is failing?

Typical failure signs: calibration drift — oven getting hotter with age; failed closed; phial displaced from its spring clips. A technician confirms it with the diagnostic test described on this page.

### Do you supply the part, or do I buy it myself?

We supply and install it. We install genuine or OEM-quality parts, and we verify the part number against your unit's serial plate before ordering — AGA part numbers change by revision and color.

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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.