24/7 emergency line. 4-hour response across London

Emergency HVAC & Heating Repair in London

Name: Mainteniq
Address: 3 Monck Street, London, Greater London, SW1P 2FA, GB
Telephone: +44 783 456 2366
Price range: ££

Air conditioning, boilers, heat interface units, fan coil units and building controls repaired fast. Gas Safe and F-Gas certified engineers, a clear price before work starts, and a fix that holds.

Call now: +44 783 456 2366 WhatsApp an engineer

REFCOM certified REF1024168Gas Safe registered engineersSafeContractor approvedNICEIC certified

Mainteniq provides emergency HVAC and heating repair across London and a 120-mile radius, with a 24/7 line and a 4-hour response target for urgent faults. We repair air conditioning, boilers and heating, heat interface units in blocks, fan coil units, MVHR ventilation and building management system faults. Every repair is quoted before work starts, carried out by certified engineers, and documented in a written report. Most of our planned maintenance contract clients came to us first with a breakdown.

What We Repair in an Emergency

If it heats, cools, ventilates or controls a building and it has stopped, this is the list.

Air conditioning not cooling

Split, multi-split and VRV/VRF systems that have stopped cooling, are leaking, tripping or blowing warm air. F-Gas certified engineers handle refrigerant faults legally and safely.

Boiler and heating failure

No heating, no hot water, lockouts, pressure loss and leaks. Gas work is carried out by Gas Safe registered engineers.

HIU faults in blocks

Cold flats, lukewarm hot water, noisy or leaking heat interface units on communal and district heating. SAV certified HIU engineers.

Fan coil unit breakdowns

FCUs that have stopped, are leaking condensate, rattling or no longer holding temperature in offices, hotels and apartment blocks.

BMS alarms and plant trips

Controls faults, plant that will not restart, sensors reading wrong and building management alarms that need an engineer, not a reset.

MVHR and ventilation failure

Ventilation units that have stopped, are running loud or are no longer moving air, which quickly turns into condensation and damp.

How an Emergency Call-Out Works

Call or WhatsApp us

Tell us what has failed, where, and how many people it affects. We give you an honest arrival time straight away.

Engineer dispatched

For urgent faults across London we aim to have an engineer with you within 4 hours. Contract clients get priority.

Diagnose and quote

The engineer finds the fault and gives you a clear price for the repair before any work starts. No surprises.

Fixed, documented, prevented

We complete the repair, send a written report, and if you want, fold the system into a planned maintenance contract so it does not fail again.

How Fast Is Emergency HVAC Repair in London?

For urgent faults across London we aim to have an engineer on site within 4 hours of your call, 24 hours a day, and most breakdowns are diagnosed and repaired on the first visit.

The honest caveat is parts. Common failures such as a boiler component, a refrigerant leak, a failed HIU plate heat exchanger or a fan motor are usually carried or sourced the same day. A rare part for an older system can take longer, and if that is the case we tell you before we leave, make the system safe, and give you a date. Contract clients are prioritised in the queue, which is one of the main reasons landlords and block managers move from call-outs to a planned maintenance contract after their first emergency.

HVAC Contractors in London You Can Call Today

Mainteniq is a London HVAC contractor covering repair, servicing and installation for air conditioning, heating, ventilation and building controls, working for landlords, managing agents, residential blocks and commercial sites.

What that means on an emergency is one contractor who can fix the boiler, the air conditioning and the controls that run them, rather than three separate trades pointing at each other. Our engineers hold REFCOM F-Gas certification, NICEIC certification and SAV Advanced HIU Service Engineer certification, gas work is carried out by Gas Safe registered engineers, and the company is SafeContractor approved. We cover every London borough and a 120-mile radius, see the areas we cover.

Who Calls Us in an Emergency

Landlords

A tenant with no heating or hot water is a legal and reputational problem within hours. We get it fixed and give you the paperwork.

Managing agents and block managers

One number for every block, a named engineer, and a report you can forward to the freeholder or residents the same day.

Airbnb and short-let hosts

A broken air conditioner or boiler between guests costs bookings. We prioritise turnaround so the next guest walks into a working property.

Offices, hotels and commercial sites

Plant failures that affect staff, guests or customers get an engineer fast and a fix that holds, not a temporary patch.

Something Broken Right Now? Call Us.

24/7 emergency line, 4-hour response across London, a clear price before work starts. Speak to an engineer, not a call centre.

+44 783 456 2366 WhatsApp now

Want to stop this happening again? See planned maintenance contracts

Emergency Repair FAQs

We run a 24/7 emergency line and aim to have an engineer on site within 4 hours for urgent faults across London. Most breakdowns are diagnosed and repaired on the first visit. Planned maintenance contract clients are prioritised in the queue. When you call we give you an honest arrival time rather than a vague window.

Air conditioning that has stopped cooling or is leaking, boiler and heating failures including no hot water, heat interface unit faults in blocks and flats on communal heating, fan coil unit breakdowns, MVHR and ventilation failures, and building management system alarms and plant trips. Gas work is carried out by Gas Safe registered engineers and all refrigerant work by F-Gas certified engineers under our REFCOM certification.

Yes for every London borough, and we cover a 120-mile radius from London for larger sites and contract clients. Our engineers are based across the capital so response times are shortest inside London. See the areas we cover for borough detail.

We quote before any work starts. The engineer diagnoses the fault, explains what has failed and gives you a clear price for the repair, and nothing is done until you agree it. There are no hidden extras added afterwards, and contract clients benefit from priority response.

Yes. The emergency line is open 24 hours a day, seven days a week. Out-of-hours attendance is for genuine emergencies: no heating in cold weather, no hot water in a block, active leaks, or plant failures affecting many residents or a commercial site. For faults that can safely wait until the morning we will tell you so and book the first available slot.

Yes, and it is how most of our contract clients started. Once the fault is fixed we can fold that system, or the whole building, into a planned maintenance contract with scheduled servicing, compliance certificates and priority emergency response, so the same breakdown does not happen again next winter.