Boiler brands rated Worcester gas boilers

Worcester

Introducing Worcester

British manufacturer Worcester first manufactured domestic oil-fired boilers in 1962. It employs more than 2,000 people in Worcester and Derbyshire. Worcester is now part of the multi-national Bosch Group. It's branding declares that Worcester are 'dedicated to heating comfort'.

Worcester gas boiler range

Worcester offers four types of combination boilers that supply heat and instant hot water. 

The Greenstar Junior series is the basic-level range for apartments and one-bathroom properties. The Greenstar Si series is for slightly larger properties and offers a higher hot water flow rate. The top of the range Greenstar CDi range can cope with properties with two bathrooms and provide flow rates of up to 17.2 L per minute. The Greenstar Highflow CDi series comprises floor-standing combis for large properties.

For homes with a traditional heat-only boiler (those that use a cold water tank and hot water cylinder for the hot water supply) Worcester offers the Greenstar Ri series that can be installed in a cabinet, the higher powered CDi boilers for larger properties and the FS CDi regular for properties where a wall-mounting is not feasible.

The compact Greenstar 12i to 24i series and larger 30CDi system boiler provide a wide range of outputs for homes that use a hot water cylinder but no cold water tank.

For details of products from the current Baxi range see our boilers review.

Worcester gas boilers - the Which? verdict

Each year Which? surveys thousands of boiler owners to find out about the reliability and customer satisfaction with each boiler brand. Compare the reliability of Worcester boilers with those from other brands with our survey of boiler reliability. 

Only logged in Which? members can view full scores in our boiler reliability table below. If you're not already a member, you can sign up to try out full access for one month, for just £1.

Brand data for Worcester gas condensing boilers
Which? Survey resultsScore
Brand reliabilitySubscriber only content
Which? Customer ScoreSubscriber only content
Ownership among Which? members with gas boilersSubscriber only content
Most common faults experienced by owners
Frozen condensate run-off pipeSubscriber only content
Problem with built-in controlsSubscriber only content
Boiler keeps switching itself offSubscriber only content
Water leaking from the boilerSubscriber only content
Boiler completely broke downSubscriber only content
Boiler noisy in operationSubscriber only content
Problem with the burnerSubscriber only content

Table notes

Average customer score is 71% and average reliability score is 71%, based on responses from 1,706 Which? connect panel members. Scores are based on boilers bought since April 2005. Brand reliability sample size (567). Customer score sample size (575). The most common faults requiring repair of Worcester boilers installed since April 2005; sample size (144).

It is interesting to note that the biggest problem recorded for Worcester boilers is actually a problem with the installation of the boiler - not the boiler itself.

Worcester warranties and installation

Worcester boilers are supplied through trade installers, not sold directly by Worcester. Worcester Accredited Installers are not employed by Worcester but are accredited by Worcester-Bosch Group to install their products. Many accredited installers specialise in Worcester products and most can offer extended guarantees.

If you have any problems with your new appliance during the manufacturer’s guarantee period you should contact your installer first to ensure it is an appliance fault. 

Worcester boilers are guaranteed against faulty materials or workmanship for 24 calendar months from the date of installation; Bosch Thermotechnology Ltd (the Worcester parent company) will repair any components that are faulty or defective for free.

The guarantee must be registered within 30 days of installation.

Unusually Worcester offers a 10-year guarantee on the heat exchangers in its boilers, providing that the boiler’s installation meets strict criteria on the sizing and positioning of the boiler - basically following best-practice guidelines. Otherwise, it offers a two-year parts and labour warranty.

Worcester servicing and repairs

Worcester claims to have 300 service engineers across the UK and Ireland.

Worcester offers it's own Service Plan for boilers that are out of guarantee. This covers up to £1,500 of approved boiler repairs every year, carried out by Worcester boiler engineers. It also includes a yearly service to ensure your boiler is running efficiently and safely.

Worcester service plan

0844 892 2332

Worcester contact details

You can contact Worcester at the following address:

Bosch Thermotechnology Ltd
Cotswold Way, Warndon
Worcester, WR4 9SW

Or through the Worcester website.

Worcester customer service

0844 892 3000

Worcester technical queries

0844 892 3366

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