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Table of Contents
Commercial HVAC Problems?
When your HVAC system underperforms, you don’t want a generic list. You want clarity and answers that actually help. Whether you’re managing a food production site, a hotel, or a manufacturing plant, the signs of HVAC trouble are usually clear. What’s harder is working out what to do next.
At Inergy Group, we don’t just maintain commercial HVAC systems, we design and install them too. That means we know what’s likely to go wrong, why it happens, and how to fix it properly. In this guide, we’ll walk through the most common signs of HVAC failure, what they often mean, and how businesses like yours have overcome them.
“From the beginning of the project with Mark Fishwick right through to the end, some 20 months later, the Inergy team, led by project manager Paul Sweetman were professional, provided up to date communication and were flexible. The project work at our site in Ellesmere Port was completed in different stages due to manufacturing requirements, so flexibility was key and I could not recommend the Inergy team higher for ducting projects.” Engineering Manager (google review – commercial HVAC)
What’s Really Going On? (And Can You Fix It?)
Most HVAC issues give you some kind of warning. Maybe your system turns on and off every few minutes. Maybe it’s unusually loud. Maybe the cooling has dropped off or stopped completely. Rather than throw a checklist at you, here’s a table of symptoms we see every week, and what they tend to point toward:
| What You’re Noticing | What’s Likely Happening | What You Can Try First |
|---|---|---|
| Cooling isn’t reaching all areas | Blocked vents, fan speed issues, or poor zoning control | Check airflow paths, diffusers, and thermostats in each area |
| System switches on/off constantly | Known as “short cycling”, often due to clogged filters or sensors | Replace filters, reset controls, or check thermostat battery/settings |
| Bad smell near ducts | Blocked drains or microbial growth in coils | Clear drain trays; if it persists, arrange a deep clean |
| Loud or unusual noises | Fan motors, belts, or loose fittings may be failing | Shut it down and book a service -running it risks further damage |
| Power but no cooling | Refrigerant loss, inverter fault, or electrical issue | Check isolators/fuses; if no change, it needs professional attention |
Commercial HVAC Troubleshooting Flowchart
Not All Troubleshooting Is the Same
How you approach a problem depends on the building and the sector you’re in. A warehouse with an evaporative cooling unit behaves very differently to a hotel’s split-system setup. So context matters.
Take, for example, a UK manufacturing facility we supported during a full HVAC overhaul. Their site used for high-spec factory production was struggling with poor air quality and uncontrollable temperature swings in two critical areas: the pre-treatment zone and the paint plant. These are both environments where uncontrolled airflow doesn’t just affect comfort it puts health, safety, and product quality at risk.
What’s the Process?
After a detailed site survey and air quality assessment, our solution included:
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A custom-built evaporative cooling system for the paint plant
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A strategically designed extract ventilation system in the pre-treatment area
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Smart controls to monitor temperature and humidity in real time
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Full technical design, install, and commissioning – all while operations continued as normal
You can read the full case study here, but the result speaks for itself: a 100% improvement in air quality, verified through independent testing. This is what good HVAC troubleshooting should lead to and not just patches, but lasting improvements that deliver real results.
Getting Ahead of Future Problems
So much of commercial HVAC performance comes down to proactive care. Small issues especially with airflow or controls can gradually wear out components or drive up your energy bills without ever triggering a full failure.
That’s why we offer tailored HVAC maintenance services, based on your building’s use, load, and environment. For high-demand facilities like pharmaceutical labs, food manufacturing, or large open-plan production spaces, regular maintenance isn’t optional – it’s of course important to stay compliant and efficient.
When You Call Inergy, Here’s What You Get
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Rapid fault diagnosis backed by deep installation experience. This is because of our director led solutions
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Sector-specific insight: we know your site’s HVAC can’t be treated like everyone else’s
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Flexible service contracts and emergency response when needed
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Expertise in alternative cooling systems like evaporative cooling
If you’re not sure whether your system needs attention or if you’re just tired of short-term fixes that never quite solve the problem – give us a call! We’ll give you a straight answer, a tailored plan, and a system that works the way it should.
📞 Call now: 01204 929999
📩 Or info@inergygroup.co.uk
