When temperatures drop, your heating system works harder than at any other time of the year. That's why winter is often when hidden faults begin to show themselves.
The good news? A heating fault doesn't always mean you need a brand-new system. In many cases, replacing a single faulty component is all that's needed to restore your heating and hot water.
At Supplied Direct, we specialise in supplying replacement parts for heating systems, including many obsolete and discontinued components that can be difficult to find elsewhere.
1. No Hot Water
Few household problems are more frustrating than turning on the tap and finding there's no hot water.
This can be caused by several faulty components, including thermostats, heating elements, sensors or control parts. Replacing the correct component is often far more cost-effective than replacing the entire cylinder or heating system.
2. Radiators Not Heating Properly
If your radiators stay cold or only warm up in certain areas, the problem may not be your boiler.
Common causes include:
- Faulty pumps
- Thermostats
- Motorised valves
- Air trapped within the system
Replacing the faulty part can often restore your heating quickly and efficiently.
3. Low Boiler or System Pressure
Low pressure is one of the most common heating issues during winter.
It may be caused by:
- Small leaks
- Worn seals
- Faulty pressure relief valves
- Expansion vessel problems
Ignoring low pressure can reduce heating performance and lead to bigger repairs later.
4. Leaking Components
Even a small drip can develop into a much larger problem if left untreated.
Leaks commonly occur around:
- Pumps
- Valves
- Heat exchangers
- Pipe connections
Replacing the leaking component early can prevent further damage and help avoid costly repairs.
5. Faulty Thermostats
A faulty thermostat can make your home feel too cold—or cause your heating to run constantly.
Signs of a faulty thermostat include:
- Heating not switching on
- Heating won't switch off
- Incorrect temperature readings
- Inconsistent heating throughout the home
Replacing the thermostat is often a straightforward and affordable solution.
Don't Replace the Whole System
Many homeowners are told they need a completely new heating system when only one component has failed.
At Supplied Direct, we've helped countless customers save hundreds—and sometimes thousands—of pounds by sourcing the exact replacement part they needed.
We specialise in:
- Gledhill spare parts
- Obsolete heating components
- Discontinued plumbing parts
- Hard-to-find replacement spares
If you're unsure which part you need, we're here to help.
Send Us a Photo
Not sure which model you have?
Simply send us a clear photo of your heating system or the faulty part. Our experienced team will help identify the correct replacement, helping you get your heating back up and running as quickly as possible.
Find Your Replacement Part Today
Before replacing your entire heating system, check whether a replacement part could solve the problem.
Browse our extensive range of heating and plumbing spares or get in touch with our team for expert advice.
Visit: www.supplieddirect.co.uk
Supplied Direct – Helping homeowners, plumbers and heating engineers keep heating systems running for less.