Hot Water but No Heating? Causes & How To Fix It

Hot water but no heating? Learn causes, fixes & expert boiler repair tips. Fast, reliable service by Narindra Gas Services.

With boilers gaining popularity over the past two decades, it has become common to use them for central heating and hot water systems. But what if you have hot water but no heating in your home? Don’t worry—you’re not alone.

Many homeowners search for “why is my boiler giving hot water but no heating”. In such cases, it is best to get a quick inspection through our boiler repair in East London service to avoid further damage.

Common Causes for Hot Water but No Heating

• Jammed or blocked radiators
• Ignition problems in the boiler
• Boiler burner blockage
• Broken motorised valve
• Faulty circulation pump
• Airlocks in the heating system

How Central Heating Works

A standard central heating system circulates hot water through pipes into radiators. If your central heating system is not working properly, it may be due to circulation issues or faulty components.

What To Do If You Have Hot Water But No Heating

Check the Motorised Valve

If your central heating is not working but hot water is fine, the motorised valve might be faulty and may require professional repair.

Check Boiler Settings

For combi boilers, check the control panel settings. Sometimes the heating mode is turned off.

Bleed the Radiators

If one radiator is warm and others are cold, trapped air could be the issue. In such cases, radiator cleaning and power flushing can significantly improve performance.

• Open the bleed valve slowly (anti-clockwise)
• Use a towel to prevent dirty water spills

Ways to Fix This Problem

Thermostat Issues

If the boiler works but radiators don’t heat, your thermostat may not be set correctly. You can also explore our central heating repair services for a complete system check.

Air Pockets in Heating System

Airlocks can stop hot water circulation. Release trapped air and check vents to restore proper heating.

Circulation Pump Fault

If nothing works, the pump might be faulty. In such cases, it is best to call an emergency boiler repair service to fix the issue quickly.

Dirt & Sludge Build-Up

Sludge can block pipes and radiators, causing uneven heating. Regular maintenance and radiator cleaning services can help prevent this issue.

Other Possible Issues

Blocked Radiators

• Cold at bottom → sludge build-up
• Warm at top only → cleaning required

Uneven Radiator Heating

Refilling the system and bleeding it can help restore heat flow. If the issue continues, professional inspection is recommended.

Heat Exchanger Problems

If faulty, radiators stay cold while water heats properly. This may require expert repair.

Noisy Boiler or Radiators

Whirring or banging sounds may indicate trapped air or pump issues, which should be checked immediately.

Hire Professionals for Boiler Repair

Having hot water but no heating can be frustrating. Instead of replacing your boiler, repairing it is often more cost-effective.

We provide reliable solutions including boiler repair, heating system repair, and emergency services.

For quick assistance, feel free to contact Narindra Gas Services today.