Ariston Appliance Repair in Broadfield

What does error code 108 mean on an Ariston boiler?

Error code 108 on an Ariston boiler indicates low water pressure in the heating circuit. Check the pressure gauge and repressurise the system using the filling loop until it reads between 1.0 and 1.5 bar. If pressure keeps dropping, this may indicate a leak - contact a Gas Safe registered engineer.

What does error code 802 mean on an Ariston boiler?

Error code 802 on an Ariston boiler indicates the automatic combustion calibration has failed. This is a combustion-related fault. Do not use the boiler. If you smell gas or fumes, do not operate any switches, ventilate the area if safe to do so, leave the property and call the Gas Emergency line from outside. Contact a Gas Safe registered engineer to check the combustion settings and gas valve.

What does error code 5P3 mean on an Ariston boiler?

Error code 5P3 on an Ariston boiler indicates flame separation from the burner during operation. This is a gas-related fault. After 6 occurrences this may escalate to error 504. Do not attempt to fix this yourself. If you smell gas, do not operate any switches, ventilate the area if safe to do so, leave the property and call the Gas Emergency line from outside. If there is no gas smell, switch off the boiler and contact a Gas Safe registered engineer.

What does error code 118 mean on an Ariston boiler?

Error code 118 on an Ariston boiler indicates a problem with the primary circuit heating delivery temperature probe. Switch off the boiler and contact a Gas Safe registered engineer to diagnose and repair the sensor fault.

What does error code 204 mean on an Ariston boiler?

Error code 204 on an Ariston boiler (Clas HE Evo, E-Combi Evo, E-System Evo models with solar) indicates the solar collector temperature probe has an open or short circuit. Switch off the boiler and contact a Gas Safe registered engineer to inspect the solar system sensor.

Why is ice building up on my Ariston Nimbus heat pump outdoor unit?

Some frost is normal in cold weather, but excessive ice buildup indicates the defrost cycle is not working properly. This can damage the compressor and reduce efficiency. Check that airflow around the outdoor unit is not blocked by debris, leaves, or snow. If ice persists, contact a qualified heat pump installer to check the defrost sensors and system.

How do I maintain my Ariston electric water heater?

Perform regular descaling to prevent limescale buildup, especially in hard water areas. Consult your instruction manual for specific maintenance procedures and always contact professional support when needed.

What is a modulating thermostat and how does it work?

A modulating thermostat uses advanced technology to communicate with your boiler in real time, maintaining constant temperatures by adjusting the boiler's output based on heating needs rather than simply turning it on and off.

Why is my Ariston electric water heater making unusual noises?

Unusual noises typically indicate limescale buildup inside the tank, which is common in hard water areas. This buildup increases heating times and energy costs. Do not attempt to inspect or repair the unit yourself. Contact a qualified technician for descaling and inspection. Always ensure the water heater is switched off at the electrical supply before any maintenance work is carried out by a professional.

How does an Ariston Nimbus Hybrid system decide when to use the heat pump or boiler?

The Nimbus Hybrid automatically chooses the most efficient heat source based on outdoor temperature, required heating temperature, and energy costs. In mild conditions, the heat pump operates alone. When temperatures drop or high heat demand is needed, the gas boiler activates. In very cold weather, both may run together. The system optimises for efficiency and running costs.