Cooker
E05
The E05 error code on a Rangemaster cooker points to a fault with the oven’s temperature sensor or thermistor — the component responsible for monitoring heat inside the cavity. It’s one of the more common Rangemaster fault codes and, while it will stop your oven from operating safely, it isn’t always an expensive fix. In this article, you’ll learn exactly what E05 means, the most likely reasons it’s appeared, what you can safely check yourself, and when it’s time to call in a professional.
What does this error mean?
When your Rangemaster displays E05, the appliance’s control board has detected a problem with the oven temperature sensor (also called a thermistor or NTC probe). This small sensor sits inside the oven cavity — usually at the back wall or top — and continuously relays temperature readings back to the main control board. If the board receives a reading that is implausibly high, implausibly low, or no reading at all (an open or short circuit), it throws the E05 fault and shuts down the oven as a safety measure. Think of it as the cooker saying: ‘I can’t tell how hot the oven is, so I’m not going to keep heating it.’ This fault affects the oven function specifically — your Rangemaster’s hob (whether gas or induction/electric) will typically continue to work normally.
Est. repair cost
£15–£40 for a DIY temperature sensor replacement; £80–£160 for a professional repair including call-out and parts
🔍 Likely causes
🛠️ Step-by-step fix
Step 1 — Power cycle the appliance: Switch the cooker off at the wall isolator switch (or at the consumer unit/fuse board if there is no isolator), wait a full 5 minutes, then restore power. A transient electronic glitch can occasionally latch an error code, and a hard reset costs nothing. If E05 clears and does not return, monitor the oven over the next few uses.
Step 2 — Check for any obvious error in the settings: Before assuming a hardware fault, confirm you haven’t accidentally activated a function lock or demo mode. Consult your Rangemaster user manual — models such as the Classic, Professional Plus, and Nexus all have slightly different menu navigation, and a settings anomaly can occasionally mimic a sensor fault.
Step 3 — Inspect the oven cavity for heavy soiling around the sensor: Open the oven door and locate the temperature sensor probe — it typically protrudes from the rear wall of the oven cavity and looks like a thin metal pin or rod, roughly 3–5 cm long. If it is heavily coated in grease or carbon, carefully clean around it using a damp cloth and a mild oven cleaner (with the oven completely cool and unplugged). Do not scrub the probe tip aggressively. Restore power and test.
Step 4 — Visually inspect the sensor and its visible wiring: With the oven cold and fully isolated from the mains, look closely at the sensor probe and the wire leading away from it. Check for any visible signs of damage — scorching, fraying, kinks, or a connector that has clearly pulled loose. If you can see a disconnected plug, you can attempt to push it firmly back into place — but only if you are confident the oven is fully isolated from the mains and you are not touching any other internal components.
Step 5 — Test the sensor resistance with a multimeter (confident DIYers only): If you own a multimeter, you can test the sensor without removing it. With the oven isolated from mains power and completely cold, disconnect the sensor’s wiring connector (it usually clips onto two spade terminals at the back of the oven). Set your multimeter to resistance (Ohms). A healthy Rangemaster NTC temperature sensor typically reads approximately 1,000–1,100 Ohms at room temperature (around 20°C). A reading of zero (short circuit) or infinite/OL (open circuit) confirms the sensor has failed and needs replacing.
Step 6 — Source and replace the temperature sensor (DIY-appropriate repair): Rangemaster temperature sensors are widely available from UK appliance parts suppliers such as eSpares, 4Cara, or directly from Rangemaster’s parts line. Prices typically range from £15–£40 depending on your specific model. You will need your full model number (found on the rating plate inside the oven door frame or in your manual). The sensor usually unscrews from the oven cavity wall with a single screw (Torx T20 or Phillips head) and the connector unplugs. Fit the new sensor, reconnect the wiring, restore power, and test. This is a safe, straightforward DIY repair for most homeowners comfortable using a screwdriver.
Step 7 — If E05 persists after a new sensor, stop DIY and consult a professional: A fault code that continues after a confirmed sensor replacement points strongly to a wiring harness fault or a main control board failure. Both of these repairs involve accessing internal electrical components and are not suitable for DIY. At this point, book a qualified appliance repair engineer.
📞 When to call a professional
Call a professional appliance repair engineer if: the E05 error returns immediately after a hard reset with no obvious cause; the sensor tests as healthy on a multimeter but the fault persists; you have replaced the temperature sensor and E05 is still displayed; or you are not comfortable isolating the appliance from mains power and working inside the oven cavity. When you call, tell the engineer: ‘My Rangemaster [give your model name and number] is showing an E05 error code. I believe it is a temperature sensor fault. I have already [describe what you’ve tried — reset, cleaned the sensor, replaced the sensor, etc.].’ This will save diagnostic time and may reduce your call-out cost. If your Rangemaster is a dual-fuel model (electric oven, gas hob), the E05 fault relates to the electric oven only — but always make the engineer aware it is a gas appliance so they can attend as a Gas Safe registered engineer if required. Never attempt to access the main control board yourself.
⚖️ Repair or replace?
For most Rangemaster owners, repair is the right call — provided the cooker is under 10 years old and the fault is limited to the temperature sensor or its wiring. Rangemaster is a premium UK brand with good parts availability, and a temperature sensor is one of the cheapest components on the appliance. If you replace the sensor yourself, you’re looking at £15–£40 in parts and 20–30 minutes of your time. A professional repair (call-out, diagnosis, and sensor replacement) typically costs £80–£160 all in. Compare this to the cost of a new Rangemaster range cooker, which starts at approximately £1,200–£1,500 for entry-level models and rises well above £3,000 for larger or premium configurations — repair almost always wins financially on an appliance of this value. However, if the engineer diagnoses a failed main control board, the calculation changes: a Rangemaster PCB can cost £200–£400 in parts alone, plus labour. On a cooker that is already 12–15 years old, it is worth weighing a board replacement (total cost potentially £350–£600) against a new appliance, particularly if other components are ageing. As a rule of thumb: if the repair quote exceeds 50% of the cost of a comparable new cooker, replacement deserves serious consideration.