Skip to content Skip to footer

Top 10 Boiler Parts Every Engineer Should Keep in Stock

Essential Spares for Everyday Jobs

Having key parts in stock can save hours on site. Here are the components every engineer should carry or keep in quick supply.

Fans – Maintain combustion airflow and prevent overheating.

Printed Circuit Boards (PCBs) – Control every boiler function.

Diverter Valves – Switch heat between water and central heating.

Thermistors & Sensors – Regulate temperature and safety cut-offs.

Pumps – Circulate hot water efficiently through the system.

Gas Valves – Control gas flow for safe operation.

Ignition Leads & Electrodes – Start the burner safely.

Pressure Switches – Monitor system pressure for safe running.

Heat Exchangers – Transfer energy from burner to water.

Seals & Washers – Simple but vital for leak-free joints.

At Newcastle Heating & Plumbing, we stock all these parts — new and refurbished — ready for same-day dispatch or collection.

Leave a comment