Local · WN6

No Hot Water, Heating Works: Common Faults in Standish

When your radiators are toasty but there's no hot water coming out of the taps, it's easy to jump to conclusions that your boiler is completely broken. But in our experience across Standish and Wigan, that's rarely the case. The boiler itself is usually fine; the problem lies with the component that directs where the heat goes. We're talking about the diverter valve. It's often stuck on the heating side, meaning all the energy is dedicated to your radiators, leaving your shower cold. Understanding this distinction is the first step to a focused repair.

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Brogas engineer diagnosing a boiler control panel for a 'no hot water but heating works' fault.

Postcode

WN6

Council

Wigan Council

Nearest road

A49 / M6 J27

From Wigan

3.5 miles north

Why locals choose Brogas here

As a Gas Safe registered business covering Wigan, Brogas identifies the root cause systematically. We test demand signals, actuator movement, and flow, ensuring an accurate diagnosis. You're left with a clear understanding of the fault and the most effective repair plan.

Typical no hot water but heating works — root causes ranked by how often we see them work in Standish

For Standish householders and landlords dealing with root causes ranked by how often we see them. Local housing stock — 1930s bay-fronted semis on Rectory Lane and newer estates off Almond Brook Road — shapes how this work is carried out.

Diverter valve cartridge worn/stuck – valve physically inspected
Diverter actuator motor failed – motor tested for operation/power
Domestic hot-water flow sensor not registering – sensor signal checked
Plate heat exchanger scaled/sludged – flow restriction and temperature differential observed
Hot-water NTC sensor misreading – sensor resistance compared to known values

What You Might See: Initial Clues

The most obvious sign is exactly what you're experiencing: heating works, hot water doesn't. This immediately points us away from a general boiler breakdown and towards a specific type of fault. We're looking at issues that prevent the boiler from delivering hot water to the taps, even though it's perfectly capable of heating the system water for your radiators. This narrows down the investigation considerably for your Brogas engineer.

Radiators are hot, taps are cold
Boiler appears to be running normally
No hot water from any tap
Heating thermostat functions correctly

How We Diagnose: Pinpointing the Problem

Our diagnostic process is systematic, designed to identify the fault efficiently without unnecessary parts replacement. We start by checking if the boiler is actually receiving a demand for hot water. This involves looking at the domestic hot-water flow sensor – if it's not registering you've opened a hot tap, the boiler won't know to switch. Next, we check the diverter valve's actuator motor. If this motor isn't moving the valve, then heat won't be directed to the hot water side. Finally, we assess the plate heat exchanger for scaling or sludge, which can restrict flow.

Test hot water demand signal
Check diverter valve actuator movement
Examine plate heat exchanger for blockage
Verify hot-water NTC sensor readings

Our Ranking of Common Causes & Confirmation

Based on our work in homes, including the 1930s bay-fronted semis common around Rectory Lane in Standish, the most frequent culprit is a worn or stuck diverter valve cartridge. This often gives little warning. Second is a failed diverter actuator motor, which is usually a more sudden failure. Less common, but still encountered, are issues with the domestic hot-water flow sensor not registering demand or a scaled/sludged plate heat exchanger, particularly in older systems without adequate system protection. Finally, a misreading hot-water NTC sensor can trick the boiler into thinking the water is hot when it isn't.

Diverter valve cartridge (most common)
Diverter actuator motor
Domestic hot-water flow sensor
Plate heat exchanger (scaled/sludged)
Hot-water NTC sensor

Nearby areas we also cover

Leigh6 miles south-east of Wigan
Hindley3 miles east of Wigan
Orrell3 miles west of Wigan
Ashton-in-Makerfield4 miles south of Wigan

Read up first

Standish FAQs — no hot water but heating works — root causes ranked by how often we see them

Why would the heating work but not the hot water?+

The boiler has a component called a diverter valve that directs heat either to your radiators or to your hot water. If this valve gets stuck on the heating side, or the part that moves it fails, all the heat goes to your radiators, leaving you without hot water. The boiler itself is still working to generate heat.

Is this a serious boiler problem?+

While inconvenient, it's typically not a 'boiler condemned' situation. The issues are usually isolated to specific components like the diverter valve or a sensor. These are often repairable parts rather than requiring a full boiler replacement. We aim to diagnose accurately to avoid unnecessary work.

Can I fix this myself?+

Working on gas appliances requires specific training and Gas Safe registration due to safety risks. We strongly advise against attempting DIY repairs on your boiler. It's best to contact a qualified Gas Safe engineer like Brogas to ensure the repair is performed safely and correctly.

How long does this repair usually take?+

Diagnosis can often be made relatively quickly due to our systematic approach. The repair time depends on the specific part that needs replacing and its availability. We carry common parts, but some may need ordering. We'll give you an estimate once the fault is confirmed.

In summary

No hot water but heating works? It's usually the diverter valve. We diagnose common causes from stuck cartridges to sensor issues in Standish, confirming faults efficiently.

No Hot Water But Heating Works in Standish?

Don't suffer cold showers. Call Brogas to accurately diagnose and repair your boiler's hot water issue.

Call Brogas Today: 07752 200878 Message us