In This Guide
When your Potterton boiler displays the E152 fault code, it signifies a hot water NTC (Negative Temperature Coefficient) sensor fault. The E152 is a type of hot water sensor fault and is one of the most common Potterton boiler faults, affecting models such as the Titanium Combi System Boiler, Promax, Gold, and Performa. This sensor is essential in regulating water temperature within the domestic hot water (DHW) circuit. If it fails, your boiler may stop providing hot water entirely or operate erratically. E152 is a typical Potterton boiler fault, and understanding common Potterton boiler faults like this is crucial for effective maintenance and timely repair. At 0800 Homefix, our experienced engineers are equipped to diagnose and fix sensor-related boiler faults quickly and safely.
What Is the Potterton E152 Fault?
The Potterton E152 error code is one of the boiler fault codes commonly seen in a common Potterton boiler, typically occurring when the DHW NTC sensor fails to read the water temperature correctly. It may also be caused by a wiring fault, a low boiler pressure, or a faulty diverter valve. This fault is especially common in models like the Potterton Assure Combi, Gold Titanium Combi System, and Ultra Gold Titanium Combi.
Common Causes of Potterton E152:
- Faulty domestic hot water sensor (DHW NTC)
- Broken or corroded wiring between the sensor and the printed circuit board (PCB)
- Sludge build-up affecting primary water circulation or flow switch
- Low system pressure or primary system water pressure
- Frozen condensate pipe or flue thermostat sensor tripped
- Gas valve connection fault or gas supply issue
- Sensor misreading due to negative temperature coefficient variance
- Central heating return thermistor fault
- Heating return thermistor fault
- Temperature coefficient NTC fault or issues with the temperature coefficient NTC sensor
- PCB fault (printed circuit board fault)
- Possible wiring fault affecting sensors or components
- DHW NTC sensor fault (domestic hot water NTC sensor)
- Flue thermistor fault
- Pre circulation fault
- Primary water circulation fault
- Outdoor sensor error
- Communication issues with the room controller
- False flame detection
- Flame failure
- Gas valve wiring fault
- Time gas valve issues (e.g., elapsed time gas valve open without gas)
- Safety error (system safety lockout or alert)
- Low voltage affecting electrical components or sensors
- Temperatures drop (cold weather causing system issues)
- Broken seals leading to pressure loss
- Old boiler (increased risk of recurring faults)
- Consider a replacement boiler or new boiler for persistent or recurring faults
- Similar faults may occur in a tank boiler
- Issues can also be seen in promax combi, promax combi system, and combi system and store models
- Related error codes: E83, E84, E85, E86
Troubleshooting the E152 Error Code
1. Check System Pressure
Inspect the pressure gauge on your boiler, and perform a water pressure test to ensure the system is within the correct range. If it’s too low, use the filling loop to bring it to the recommended level, typically around 1.5 bar. Low boiler pressure can disrupt sensor function and circulation.
2. Inspect the DHW NTC Sensor
Look for signs of corrosion, limescale, or physical damage, as these may indicate a DHW NTC sensor fault. Faulty temperature sensors should be replaced immediately by a Gas Safe engineer.
3. Test Wiring and PCB
Loose, burnt, or broken wiring may be causing communication failure between the NTC sensor and the PCB. Faults in the printed circuit board itself may also trigger error codes like E152.
4. Examine Pump and Flow Switch
A probable pump jammed or heating flow switch error can prevent water from circulating properly, leading to false temperature readings and boiler shutdown. Check for any blockage or sludge build-up in your system.
5. Check for Other Errors
Other faults such as E83, E84, E85, or E86 could indicate deeper issues within the heating circuit or flue system. Additionally, verify the power input some models may throw this error with a wrong power supply Hz input.
Preventing Repeated Sensor Faults
- Schedule annual servicing for your Potterton boiler
- Ensure all sensors, including the central heating thermistor sensor and DHW NTC, are cleaned and tested
- Bleed radiators and inspect the condensate pipe during cold weather
- Use system cleansers to prevent sludge build-up
- Monitor boiler pressure, and test the differential water flow switch regularly
Frequently Asked Questions
What does the Potterton E152 error code mean?
Can I reset my boiler to clear the E152 error?
Is E152 common in Potterton boilers?
Could this fault impact my central heating too?
Can 0800 Homefix help with this issue?
Need a professional to fix your Potterton E152 fault?
Call 0800 Homefix – your trusted partner for safe and efficient boiler repairs across all Potterton models.
For more detailed Potterton official support, the Worcester Bosch website (which owns Potterton) also provides boiler manuals and guidance:
https://www.worcester-bosch.co.uk/support
Editorial note: This article is intended as a general homeowner guide. All plumbing work on supply pipes should be carried out by a qualified, WaterSafe-registered plumber. If you suspect a gas leak, leave the property immediately and call the National Gas Emergency Service on 0800 111 999.
