Air conditioning repairs, found and fixed properly.
Unit playing up? Call Ted with the error code to hand.
Call 07940 953486 nowWhen an air conditioner goes wrong, the symptom rarely tells you the cause. Warm air can mean a setting, a blocked filter, a failing fan or a refrigerant leak. Water on the carpet can be a blocked drain or a coil that has iced over. That is why every repair starts with diagnosis rather than guesswork or a quick regas.
Ted McCarthy Services repairs home and commercial systems from a Hemel Hempstead base, with more than thirty years of experience on the tools. We work on units we installed and on systems fitted by others.
What happens on a repair visit
The engineer starts with what you have noticed and any error code on the display, then checks airflow, filters, the condensate drain, electrical supply and controls. If refrigerant is suspected, pressures are measured and the pipework and joints are tested for leaks. Refrigerant is only ever handled by Refcom F-Gas certified engineers in line with the regulations, and a leaking system is repaired before it is recharged, because topping up a leak simply wastes gas and money.
Once the cause is clear, you are told what is wrong, what it needs and whether repair is sensible for the age of the unit. Nothing is replaced without you knowing why.
Things worth checking first
A surprising number of problems are simple: flat remote batteries, the unit set to fan or dry mode, a tripped isolator, filters thick with dust, or leaves and bins crowding the outdoor unit. Checking these could save a visit. If none of them helps, note any code on the indoor unit and give us a call on 07940 953486. Our troubleshooting guides explain the common symptoms in more detail.
Businesses that cannot afford downtime should consider a maintenance contract. Planned visits catch problems early, and contract customers receive priority response and access to the out of hours line.
- No cooling or no heating
- Water dripping from the indoor unit
- Refrigerant leak detection and repair
- Error codes and control faults
- Tripping breakers and electrical faults
- Iced coils, weak airflow, noisy fans
- Panasonic, LG, Midea and other makes
- Refcom F-Gas certified engineers
Why choose us
A specialist you can trust on site.
Honest diagnosis before any parts
Leaks found and fixed, not just topped up
Refcom F-Gas certified, fully insured
30+ years repairing all major makes
Recent work
Examples of diagnosis before parts projects.
How it works
A simple, transparent process.
01
Call with the symptom
Tell us what the unit is doing and any error code shown.
02
Diagnosis
Airflow, drain, electrics, controls and refrigerant checked.
03
Clear explanation
What is wrong, what it needs, and whether repair makes sense.
04
Repair
Fault corrected, leaks sealed and system recharged where needed.
05
Test
System run and checked before we leave.
FAQs
Frequently asked questions
What faults do you repair?
Systems that will not cool or heat, units leaking water, refrigerant leaks, error codes, tripping electrics, iced coils, weak airflow, noisy outdoor units and units that will not switch on.
Can you repair a system you did not install?
Yes. We diagnose and repair systems from other installers, including Panasonic, LG and Midea equipment.
Is it just topping up the gas?
No. If refrigerant is low, it has leaked out somewhere. The leak is found and repaired first, then the system is recharged and tested. Refrigerant work is carried out to F-Gas regulations by Refcom certified engineers.
What should I check before calling?
Check the remote batteries and mode, the isolator and fuse board, the filters, and whether anything is blocking the outdoor unit. Write down any error code shown on the indoor unit.
Do you offer out of hours repairs?
Our normal hours are Monday to Friday, 08:00 to 17:00. Maintenance contract customers receive priority response and use of the out of hours line.
Is it worth repairing an old system?
Often, yes. If the unit is very old or needs a major component, the engineer will tell you honestly whether repair or replacement makes more sense before any work is done.
Service areas
Air conditioning repairs across Hertfordshire & the South East
Local air conditioning repairs engineers covering Hertfordshire, Buckinghamshire, Bedfordshire and the edges of London. Pick your town for area-specific information.
Helpful reading
Guides related to diagnosis before parts
Air Conditioning Not Cooling Properly
A unit that runs but never quite cools the room is one of the most common calls we get, and the cause is rarely the compressor.
Air Con Leaking Water Indoors
Water appearing under or around an indoor unit is almost always a drainage problem rather than a refrigerant one, and it's often an easy fix.
What Air Conditioning Error Codes Mean
Flashing lights and displayed error codes are the system telling you roughly where the fault sits, well before an engineer even connects test equipment.
Signs of a Refrigerant Leak
Refrigerant leaks rarely announce themselves clearly, and usually show up as a gradual decline in performance rather than a sudden dramatic failure.
Ready to get started?
Speak directly to Ted for professional advice and a free quotation.