Losing both heating and hot water is one of the clearest signs that your boiler or its controls need attention. Boilers 4 Essex provides boiler repairs across South Ockendon for homeowners experiencing complete or intermittent heating failure.

Common Causes of No Heating and No Hot Water

• Boiler electrical supply problem
• Programmer or thermostat settings
• Low system pressure
• Boiler lockout
• Ignition failure
• Frozen condensate pipe during cold weather
• Circulation or pump fault
• Internal boiler component failure

Check the Controls First

Make sure the heating programmer is switched on and the room thermostat is asking for heat. With smart controls, check that the thermostat has power and appears connected.

Check the Boiler Pressure

Look at the pressure display or gauge and compare it with your boiler manufacturer's user instructions. If the pressure is below the stated operating range, read our guide to boiler pressure being too low.

Is the Boiler Showing a Fault Code?

Write the code down. It can help an engineer understand what condition the boiler has detected, although a code does not always prove which component has failed.

Use our boiler fault-code guide for the next step.

Has the Boiler Locked Out?

A boiler may lock out after ignition failure, overheating, pressure problems or other detected faults. A single reset may be permitted by the user manual, but repeated resetting is not a substitute for diagnosis.

Read more about boiler lockout in South Ockendon.

Could the Condensate Pipe Be Frozen?

During freezing weather, an external condensate pipe can freeze and prevent a condensing boiler from operating normally. See our frozen condensate pipe guide before doing anything.

What If the Boiler Will Not Fire?

If the display is on and the boiler attempts to start but does not establish a flame, read our guide to a boiler that won't fire up.

Frequently Asked Questions