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Heating Services Certas Energy Reviews 

309
TrustScore 5 out of 5

4.8

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Review summary

Created with AI, based on recent reviews

Considering 147 reviews, reviewers overwhelmingly had a great experience with this company. Customers frequently mention that engineers arrive promptly on schedule and carry out routine boiler services with remarkable efficiency and professional skill. People consistently appreciate how polite, cheerful, and genuinely helpful the staff members are during every single home visit. Consumers also value the thorough explanations provided regarding ongoing boiler maintenance and any necessary part replacements. Some reviewers were not happy with communication issues and felt that customer support responses lacked proper accountability when things went wrong. Consumers noted occasional instances where appointment details were outdated or automated replies completely failed to provide any meaningful assistance.

What people talk about most

Service

Consumers find service to be positive, highlighting efficient and thorough annual boiler maintenance.... See more

Staff

Reviewers mention positive feedback about staff, highlighting that engineers are consistently polite,... See more

Customer service

Customers had positive experiences with customer service, highlighting very good communication and... See more

Reviews shaping this summary

Rated 5 out of 5 stars

Jake Winter came on an emergency call out to fix our oil boiler then luckily soon after to service it. He was really helpful and did a really great job. Excellent work . Polite friendly and efficient... See more

Company replied

Rated 5 out of 5 stars

We had our boiler serviced by Mark Armstrong today. He has been maintaining our boiler for many years and as always was polite, efficient and informative. Before we first met Mark we were told we need... See more

Company replied

Rated 5 out of 5 stars

Phil Cooke telephoned to advise estimated time of arrival and arrived on time. He was polite, pleasant, cheerful and informative. He explained the function of the part he was renewing and showed me... See more

Company replied

Rated 5 out of 5 stars

Oil boilers are complex beasts and need a good engineer who is thorough and detailed. Mark Armstrong of Certas has been servicing our boiler for many years. He is a superb engineer and combines his ex... See more

Company replied


Company details

  1. Boiler and Heating Service

Written by the company

From boiler maintenance and fuel monitoring to tanks and more, it’s safe to say we know a thing or two about looking after your heating needs.​ ​ When you choose Certas Energy Heating Services you choose:​ • Reliable, speedy, local service​ • Lovely OFTEC-registered engineers ​ • A vast stock of reputable parts with 12-month guarantees​ • FREE carbon monoxide checks ​ • Top quality replacement boilers from Worcester Bosch and Grant UK​ • Monday to Friday support​


Contact info

4.8

Excellent

TrustScore 5 out of 5

309 reviews

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1-star

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4.8

All reviews

(309)

117 reviews in the last 12 months

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Companies on Trustpilot aren't allowed to offer incentives or pay to hide reviews. Reviews are the opinions of individual users and not of Trustpilot. Read more

Rated 5 out of 5 stars

Oil fired boiler service

Mark Armstrong has serviced our oil fired boiler for nearly ten years and has always been careful, diligent and professional. Latest visit was no exception - thanks Mark!

February 5, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Good Morning Peter
Thank you for your 5-star review. We’re pleased to hear you had a positive experience with us.
Kind Regards
Certas Energy

Rated 5 out of 5 stars

Our regular boiler maintenance

Our regular boiler maintenance carried out efficiently by Phil Cooke. Identified some irregularities without pressure. Good experience.

February 4, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Good Morning Phil
Thank you very much for your kind feedback. We’re delighted to hear you were happy with our service.
Kind Regards
Certas Energy

Rated 5 out of 5 stars

Mark Armstrong has been our maintenance…

Mark Armstrong has been our maintenance engineer for a number of years and he never fails to impress me. He is brilliant at resolving problems with our boiler leaving us confident that the boiler will remain in good order until its next service.

February 4, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Hi Sydney
Thank you for your kind words. Customer satisfaction is very important to us, so it’s great to hear this.
Kind Regards
Certas Energy

Rated 5 out of 5 stars

Certas - Mark Armstrong service engineer

Mark Armstrong has been servicing our boiler for many years. He is thorough and tidy and keeps our now elderly oil fired boiler in tip top condition. Thank you Mark, we really appreciate your care.

February 3, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Good Morning Juliet
Thank you for your 5-star review. We’re pleased to hear you had a positive experience with us.
Kind Regards
Certas Energy

Rated 5 out of 5 stars

Problem solved

Phillip Cooke arrived as expected to deal with the oil boiler problem. The oil had run out and on refill the boiler refused to start. He set about exploring the situation. It was tricky and so he contacted the boiler manufacturer and sought advice. He got a solution to the situation from his own office and fired up the boiler. Phillip was personable professional and efficient.

February 2, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Good morning Ms Scott
Thank you for your positive feedback. We’re so pleased to hear you had a good experience.
Kind Regards
Certas Energy

Rated 5 out of 5 stars

Broken old boiler

Broken old boiler, cold winter - Phillip Cooke came and sorted it all out in 40 mins. Very impressed and pleased with service and Phillip. Thank you.

January 30, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Good Morning Mark
Thank you for your 5-star review. We’re pleased to hear you had a positive experience with us.
Kind Regards
Certas Energy

Rated 5 out of 5 stars

Boiler problems

Mark Armstrong visited us to investigate a problem with our boiler and, as always, was a huge help. He is always ready to come back if required and go that extra mile which is hugely reassuring when there is a problem and we very much appreciate his help and support.

January 26, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Hi Clare
Thanks for your great review. We’ll be sure to pass your comments on to the team.
Kind Regards
Certas Energy

Rated 5 out of 5 stars

Mark Armstrong - excellent service engineer

Mark Armstrong, as usual, arrived on time and worked carefully and efficiently. He explained clearly what he did and about the current state of the boiler. Mark has serviced our boilers for many years and has always provided excellent service
.

January 29, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Hi David
That’s lovely to hear, thank you for your feedback. We truly appreciate you choosing Certas Energy.
Kind Regards
Certas Energy

Rated 5 out of 5 stars

Mark Armstrong came to service Aga

Mark Armstrong is always happy and takes time to explain what he is doing. He has looked after my Aga and boiler for years and is a brilliant engineer.

January 26, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Hi EN
Thank you for leaving this lovely review. It’s great to know you’re happy with the service you received.
Kind Regards
Certas Energy

Rated 5 out of 5 stars

Very polute and friendly

Very polite and friendly Heating Engineer, Mr Jake Winter, carried out the boiler service with efficient work and good advice given thank you.

September 15, 2025
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Hi Ruth
That’s lovely to hear, thank you for your feedback. We truly appreciate you choosing Certas Energy.
Kind Regards
Certas Energy

Rated 5 out of 5 stars

Mark Armstrong came to service the…

Mark Armstrong came to service the boiler. He arrived promptly was efficient and polite and left the area very tidy.

January 14, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Good Morning Liz
Thank you very much for your kind feedback. We’re delighted to hear you were happy with our service.
Kind Regards
Certas Energy

Rated 5 out of 5 stars

Jake Winter Certas Engineer

Jake Winter came on an emergency call out to fix our oil boiler then luckily soon after to service it. He was really helpful and did a really great job. Excellent work . Polite friendly and efficient and very professional and let us know what needed to be done. Very good communication. He also explained some remedial work that needed doing which was obvious when he pointed it out so well spotted. Very thorough. He also arranged a future visit to sort the problem out.

January 23, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Hi Mr R
That’s lovely to hear, thank you for your feedback. We truly appreciate you choosing Certas Energy.
Kind Regards
Certas Energy

Rated 5 out of 5 stars

Mark Armstrong's been coming here for…

Mark Armstrong's been coming here for years, doing our boiler. Always prompt, always positive, a ray of sunshine on a dull January day. Thanks Mark!

January 19, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Hi Peter
Thanks for your great review. We’ll be sure to pass your comments on to the team.
Kind Regards
Certas Energy

Rated 1 out of 5 stars

Never again

Ordered online. Given on or before 14th for delivery. Well 14 th came and went. No communication at all. Contacted via telephone. Took 3 attempts waiting over ten minutes each time. Cancelled order. Not happy at all.

January 19, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Good morning Martin - Thank you for your feedback on our Certas Energy Fuel. So sorry to hear this, please accept our sincere apologies for the lack of communication you received on your last delivery. I can assure you, that your feedback has been passed over to the relevant department. Kind Regards Certas Energy

Rated 2 out of 5 stars

Overpriced parts

I have no problem with the engineer but they seriously overcharge for parts . They have charged me 104.38 before vat for a transformer which is available from reputable dealers for 35.93 before vat

December 22, 2025
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Good Morning Tatty - Thank you for your feedback. So sorry to hear this, I can assure you I have passed your feedback over to the relevant department. Kind Regards Certas Energy

Rated 5 out of 5 stars

Thank you Jake Winter !

This is the fist time we have had 'Certas Energy' service and repair our boiler, as apposed to just the supplied oil.
The service engineer - Jake Winter, came to service and repair, our 'Firebird" boiler! Jake was punctual, courteous and very professional.
I will be asking for him again, may the need arise.
Thank you 'Certas Energy' for helping us out, and please pass the warm sentiments onto to Jake, as he is a credit to your Company!!

January 9, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Good Morning Chris
Thank you very much for your kind feedback. We’re delighted to hear you were happy with our service.
Kind Regards
Certas Energy

Rated 5 out of 5 stars

Mark Armstrong did an excellent job

Mark Armstrong arrived on time, did an excellent job servicing our boiler, including giving the cupboard a good Hoover. He was informative, friendly and very respectful of our home.

December 10, 2025
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Hi Caroline
Thanks for your great review. We’ll be sure to pass your comments on to the team.
Kind Regards
Certas Energy

Rated 5 out of 5 stars

Very thorough service

Riki Urquhart arrived punctually and carried out a thorough service on our oil boiler, explaining many aspects along the way in a friendly manner.

January 15, 2026
Unprompted review
Rated 5 out of 5 stars

Engineer Mark Armstrong arrived on…

Engineer Mark Armstrong arrived on time. He was already familiar with our boiler and immediately identified the issue and had spare parts to hand to effect a repair. Mark was diligent, friendly and obviously experienced with our type of boiler. I would not hesitate to ask Certas and Mark to attend to any future issues. Hopefully this will not now be the case.

January 6, 2026
Unprompted review
Heating Services Certas Energy logo

Reply from Heating Services Certas Energy

Hello Robert
Thank you for taking the time to leave your 5-star review. It’s great to hear you are happy with our service.
With kind regards Dave

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