Having no heating or hot water in Chelmsford usually means you need to check the boiler and its controls rather than one individual radiator or tap.
Start with power, pressure, thermostat settings and any fault code shown on the boiler. If those checks do not identify a simple problem, professional diagnosis may be needed.
Check that the boiler has power, the heating controls are on, the pressure is within the range stated in the appliance instructions and no fault code is displayed. Do not remove the boiler casing.
No Heating or Hot Water in Chelmsford: First Checks
Check the electrical supply
If the display is blank, make sure the boiler switch has not been turned off and check your consumer unit.
Check your heating controls
Make sure the programmer and thermostat are correctly set. If your thermostat is wireless, check the batteries.
Check the boiler pressure
A low-pressure reading can prevent some boilers operating normally.
For a one-off low reading, see boiler pressure too low in Chelmsford.
Check for a fault code
Photograph the display before attempting any reset.
Our Chelmsford boiler fault-code guide explains what to do next.
What If the Boiler Won't Ignite?
If the boiler has power and receives a demand but cannot establish a flame, the problem may involve ignition, gas supply, condensate drainage or another internal fault.
Read why a boiler won't fire up in Chelmsford.
What If the Boiler Has Locked Out?
Lockout is the boiler protecting itself after detecting a problem. Record the fault code before resetting it.
See our boiler lockout in Chelmsford guide.
Cold Weather and Frozen Condensate Pipes
In freezing weather, exposed condensate pipework can freeze and cause a modern condensing boiler to stop.
See how to thaw a frozen condensate pipe safely.
Hot Water Works but the Heating Doesn't?
That is a different symptom. If your taps still get properly hot while the radiators stay cold, use our dedicated hot water but no heating in Chelmsford guide.
When to Call a Boiler Engineer
- The boiler remains off after checking power and controls.
- The same fault code returns after reset.
- The boiler will not ignite.
- The pressure repeatedly falls.
- The boiler leaks water.
- You are not comfortable carrying out the homeowner checks.
No Heating or Hot Water in Chelmsford?
Boilers 4 Essex provides boiler fault diagnosis throughout Chelmsford, including Springfield, Great Baddow, Broomfield, Writtle and surrounding areas.
Initial attendance is £108 including VAT and up to one hour on site.
Book a Chelmsford Boiler Repair →Related Guides
- Boiler not working in Chelmsford
- Boiler won't fire up in Chelmsford
- Boiler pressure too low in Chelmsford
- Boiler lockout in Chelmsford
- Frozen condensate pipe in Chelmsford
- Hot water but no heating in Chelmsford
Frequently Asked Questions
Why have both my heating and hot water stopped?
Possible causes include power or control problems, low pressure, boiler lockout, ignition failure, condensate issues or an internal boiler fault.
Can low pressure cause no heating or hot water?
It can on some sealed boiler systems. Check the pressure against the manufacturer's instructions for your exact model.
What if only the heating has stopped?
If hot water still works, the heating controls, circulation system or, on some combi boilers, a diverter-valve fault may need checking.
