🔧 What’s Included in a Boiler Service

A professional boiler service ensures your heating system runs safely, efficiently, and reliably—especially during the colder months. Whether you have a combi, system, or conventional boiler, an annual service helps prevent breakdowns and keeps your warranty valid.

Boiler servicing can vary depending on the make and model, but here’s what’s typically included:

✅ Boiler Servicing Checklist

1. 🔍 Visual Inspection

The engineer will visually inspect your boiler and heating system to:

• Check for leaks, corrosion, or signs of damage
  
  

• Ensure your boiler meets current safety regulations
  
  

• Assess the flame (if visible) for proper combustion
  
  

2. 🧪 Safety & Flue Gas Analysis

• Use a flue gas analyser to test carbon monoxide levels and combustion efficiency
  
  

• Ensure the flue is correctly fitted and safely terminated
  
  

• Test key safety components
  
  

⚠️ Most modern boiler manufacturers advise against fully dismantling the internal components unless the flue gas readings are outside safe limits or a specific fault has been identified. 

3. ⚙️ Internal Components Check (If Needed)

Only if required, the engineer may remove the casing to check and clean:

• Heat exchanger
  
  

• Condensate trap
  
  

• Burner and electrodes
  
  

Some newer boilers are sealed or self-cleaning and only require internal inspection if there's an issue.

4. 🧼 System Filter & Inhibitor Check

• Clean out the magnetic filter (if your system has one)
  
  

• Test the inhibitor level in your heating system to help prevent rust and sludge buildup
  
  

Not every system will include a filter, but they’re common in modern installations.

5. 💧 System Pressure & General Operation

• Check and top up boiler pressure if needed
  
  

• Inspect pipework, joints, and seals for leaks
  
  

• Ensure thermostats, timers, and heating controls are functioning properly
  
  

6. 📋 Service Report & Certification

• Complete a full service report with test results
  
  

• Log the service in your boiler service record book
  
  

• Issue a boiler service certificate—often required to maintain manufacturer warranty
  
  

🛠 Optional Extras (May Be Charged Separately)

Some engineers may offer additional services such as:

• Radiator bleeding
  
  

• Powerflushing the heating system
  
  

• Replacing inhibitor or chemical treatments
  
  

🧑‍🔧 Who Should Service Your Boiler?

Always use a Gas Safe registered engineer in the UK. This ensures your boiler is serviced safely and legally. Ask to see their registration card before the service begins.

❄️ Why You Should Service Your Boiler Before Winter

We strongly recommend booking your boiler service before winter begins. This helps you:

• Avoid peak-season engineer availability issues
  
  

• Catch minor faults before they become winter breakdowns
  
  

• Ensure your heating switches on reliably after summer
  
  

• Maximise energy efficiency when you need it most
  
  

Heating systems often fail the first time they’re turned on after months of inactivity—don’t wait until the cold sets in to find out!

Looking for trusted boiler servicing in your area?

Contact our certified Gas Safe engineers in Reading today for expert boiler servicing and honest advice.