When the Split AC Stopped Cooling During a Heatwave, Mohit Found the Best AC Service in Aligarh

Boomzo

 By the third week of June, Aligarh was in the middle of the kind of heatwave that made even short trips outside feel like a mistake. The local weather advisory had been repeating the same warning for four straight days: avoid unnecessary outdoor activity between noon and four, stay hydrated, and keep an eye on anyone elderly or unwell in the household.

For Mohit Bansal, this was exactly the week his split AC chose to give up on cooling properly.

It was not a dramatic failure. The unit turned on normally. The display showed the set temperature. The indoor fan ran at full speed, and air came out of the vents but the air was barely cool, nowhere close to what eighteen degrees should feel like, and the room temperature stubbornly refused to drop no matter how long the unit ran.

Mohit had been through two AC problems already that season  a compressor electrical fault back in May that had been tripping his home's main power supply, and a short cycling issue a few weeks later caused by a blocked outdoor condenser coil. Both had been resolved through doorstep visits from the same technician, Ankit, and Mohit had genuinely believed, after the second visit, that his AC troubles for the year were behind him.

This felt different from both of those. There was no tripping breaker. The compressor was not shutting off and restarting  it ran continuously, steadily, for as long as he left the unit on. It simply was not cooling.

Given that this was the worst heatwave week of the summer so far, and given that his elderly mother was staying with them for a few weeks, Mohit was not willing to wait and see if it resolved on its own. He called for the Best AC Service in Aligarh the same afternoon he noticed the problem.

Why This Felt Different From the Earlier Two Issues

Before calling, Mohit thought through what was different this time, partly because the previous two experiences had taught him to pay closer attention to the specific pattern of a fault rather than just noticing "something is wrong."

No tripping breaker  this ruled out a repeat of the earth leakage fault from May, which had specifically affected the home's main power supply.

No on-off-on cycling this ruled out a repeat of the short cycling issue from the blocked condenser coil, where the compressor had been shutting down and restarting every twelve minutes or so.

What he had instead was continuous operation with a steady, but completely inadequate, level of cooling  the unit working the entire time, just not achieving the result it should.

He called Ankit directly, given the history.

The Call with Ankit

Mohit: This is a different one again. It's not tripping anything, and it's not cycling on and off like last time. It just runs constantly and barely cools at all. Given the heat this week, I need this looked at today if possible.

Ankit: Understood and given the timeline you're describing, "running continuously but barely cooling" is a different pattern from both of your earlier issues, and it points toward a different cause. Has the unit been cooling normally for most of the season, and this is a recent change, or has it been gradually getting worse?

Mohit: It's been fine  genuinely fine  since the coil cleaning a few weeks ago. This started two days ago, fairly suddenly.

Ankit: A relatively sudden drop in cooling capacity, with the compressor running continuously rather than cycling or tripping, is a pattern that often points toward refrigerant loss — either a slow leak that has finally dropped the gas level below what's needed for effective cooling, or in some cases a more sudden loss from a specific failure point. Refrigerant is what actually absorbs and releases heat in the system — when there isn't enough of it circulating, the compressor and fan can both run perfectly normally, the system can appear to be "working," but the actual cooling effect drops significantly because there simply isn't enough refrigerant to do the job.

Mohit: Could this be connected to the coil cleaning a few weeks ago? Could something have been disturbed during that service?

Ankit: It's a fair question, and I'll check that specifically when I'm there — but in most cases, refrigerant leaks are slow and develop independently over months or even longer, often at a joint, a flare connection, or a small corrosion point in the copper tubing. The timing lining up with extreme heat is actually a separate and very common pattern: a system running with marginally low refrigerant can still cool a room adequately during moderate temperatures, but during a heatwave, when the system is working against a much larger temperature difference between inside and outside, that same marginal refrigerant level becomes insufficient. The heat doesn't cause the leak — it just exposes how little margin was left.

Mohit: That actually makes a lot of sense. It's been working fine until this specific heatwave hit.

Ankit: I'll come this afternoon and check pressure levels directly, which will tell us immediately whether refrigerant is the cause, and if so, we'll locate the leak point before simply topping up the gas  refilling without finding and fixing the leak just means you're back here again in a few months.

Ankit scheduled the visit for later that afternoon, given the urgency of the heat and Mohit's mother staying with them.

Ankit Arrives  Checking Pressure First

When Ankit arrived, he connected pressure gauges to the outdoor unit's service ports before doing anything else, switching the AC on and observing the readings as the system ran.

Ankit: The pressure reading is significantly below what it should be for today's conditions — this confirms refrigerant loss as the cause of the poor cooling. The compressor is running normally, which is consistent with what you described, but it's circulating a reduced volume of refrigerant, so the actual heat exchange happening at the indoor coil is well below what the room needs.

Mohit: How much refrigerant has actually been lost? Is this a small amount or has it mostly leaked out?

Ankit: Based on this pressure reading, I'd estimate the system has lost somewhere around a third of its normal refrigerant charge. That's significant enough to explain the dramatic drop in cooling you're seeing, especially under heatwave conditions, but it's not a complete loss — which is useful information, because it tells me this has likely been a slow, gradual leak rather than a sudden major failure.

Ankit then moved to identifying the leak source, since simply adding refrigerant without finding the leak point would only delay the same problem from recurring.

He applied a UV-reactive dye to the system and ran it for a period to allow the dye to circulate and escape at the same point the refrigerant was escaping. Using a UV light, he then inspected the indoor unit, the outdoor unit, and the connecting copper line running between them along the wall.

Ankit: Found it. There's a small leak at one of the flare connections on the outdoor unit, where the copper line attaches to the service valve. This kind of leak often starts very small — sometimes from minor vibration over time loosening the connection slightly, or from a small amount of corrosion developing at the joint. It's slow enough that it can take many months to lose enough refrigerant to actually affect cooling performance, which fits with your unit working fine for most of the season until now.

The Repair

With the leak point identified, Ankit completed the repair in the same visit:

• System depressurized safely — Remaining refrigerant was recovered before any work on the connection began
  
  
• Flare connection disassembled and inspected — The fitting was checked for damage to the flare surface itself, not just the immediate leak point
  
  
• Flare re-cut and reheated — The copper tubing end was re-flared to create a clean, properly seated connection, since a degraded flare surface will continue to leak even after reassembly if not corrected
  
  
• Connection reassembled and torqued to specification — Using a calibrated torque wrench to ensure the joint was neither under-tightened (which would leak again) nor over-tightened (which can damage the flare)
  
  
• Nitrogen pressure test — The system was pressurized with nitrogen and held for a period to confirm the repaired joint no longer leaked, before any refrigerant was reintroduced
  
  
• System evacuated with a vacuum pump — Any air or moisture that had entered the system during the leak and repair process was removed, since moisture in a refrigerant system causes long-term corrosion and efficiency loss if not properly evacuated
  
  
• Refrigerant recharged to manufacturer specification — The correct refrigerant type and precise quantity were added, measured by weight rather than just by pressure reading, for accuracy
  
  
• Final performance verification — Pressure readings, outlet air temperature, and the rate of room temperature drop were all checked against expected values before Ankit considered the job complete

The entire repair took just under two hours, including the leak detection process.

The Difference by That Evening

By early evening, with the heatwave still in full force outside, Mohit's living room had reached a comfortable temperature for the first time in three days.

Mohit: This is what it's supposed to feel like. I'd genuinely started to wonder if the unit itself was just too old to handle this kind of heat anymore.

Ankit: It's a reasonable thing to wonder, but in this case the unit itself is fine — it simply didn't have enough refrigerant to do its job properly. With the leak fixed and the system properly recharged, there's no reason this unit can't handle Aligarh summers for years yet.

Mohit: Three different problems from the same AC in one season. I have to ask — is that normal, or has this unit just had unusually bad luck?

Ankit: Three issues in one season is more than typical, but each of these has been independent and unrelated to the others — an electrical fault, a maintenance issue from dust buildup, and now a refrigerant leak at a joint. None of these are symptoms of the same underlying problem; they're just three different components reaching the point where they needed attention, somewhat close together. The genuinely good news is that between the three visits, your unit has now had a fairly thorough going-over — electrical, mechanical, and refrigerant systems have all been checked and corrected this season.

Why It Worked Fine Until the Heatwave Is a Common and Misleading Pattern

Mohit's experience reflects something that catches many AC owners off guard during extreme heat events: a unit running with a slow, gradually developing refrigerant leak can perform adequately — sometimes almost normally — during moderate weather, only to fail noticeably the moment temperatures spike.

This happens because cooling capacity is relative to the temperature difference the system has to work against. A system with reduced refrigerant might still produce enough cooling to bring a room from thirty-two degrees down to a comfortable level. The same reduced refrigerant level, asked to fight against forty-five-degree heat pressing in from outside, simply does not have the capacity left to keep up.

This means the timing of a refrigerant-related cooling failure is often misleading. The leak did not start during the heatwave — it had likely been present for weeks or months. The heatwave simply removed the system's margin for error and made a previously tolerable problem suddenly very noticeable.

Signs Your Split AC May Have a Refrigerant Leak

• The AC runs continuously without the compressor cycling off, yet the room never reaches the set temperature
  
  
• Cooling has gradually weakened over weeks or months, rather than failing suddenly
  
  
• Performance seems disproportionately worse during the hottest days, even though the unit "worked fine" during milder weather
  
  
• Ice or frost forms on the indoor unit's coil or the connecting copper pipe — a common secondary symptom of low refrigerant pressure
  
  
• A hissing sound is occasionally audible near the indoor or outdoor unit, particularly right after switching the AC on

Any of these signs during a heatwave is worth a same-day call to a Split AC Service Aligarh technician, since waiting through the hottest days with reduced cooling capacity is both uncomfortable and, for vulnerable household members, a genuine health consideration.

Frequently Asked Questions

Question: Why does a split AC stop cooling during a heatwave even if it worked fine before?

Answer: This pattern typically occurs when a unit has a slow, pre-existing refrigerant leak that has gradually reduced the system's gas charge over weeks or months. During moderate weather, the reduced refrigerant level may still provide adequate cooling. During a heatwave, the larger temperature difference between indoor and outdoor air demands more cooling capacity than the system has left, causing a sudden and noticeable drop in performance. The heat does not cause the leak — it exposes a problem that was already developing.

Question: How is a refrigerant leak in a split AC diagnosed?

Answer: A technician connects pressure gauges to the system's service ports to measure the current refrigerant pressure against expected values, which confirms whether refrigerant loss is occurring. To locate the specific leak point, a UV-reactive dye is added to the system and circulated, then a UV light is used to inspect connections, joints, and tubing for the glowing trace where refrigerant — and the dye with it — is escaping. This method is more reliable than visual inspection alone, since small leaks often show no visible signs without the dye.

Question: Is it normal for a split AC to need gas refilling every year?

Answer: No. A properly sealed, well-functioning split AC system should not lose refrigerant under normal operation, since refrigerant circulates in a closed loop and is not consumed like fuel. If a unit needs refrigerant added every year or every season, this indicates an ongoing leak that should be located and repaired rather than simply topped up repeatedly. Repeated top-ups without leak repair are a temporary fix that costs more over time and can also indicate a slowly worsening leak.

Question: How long does split AC gas refilling and leak repair take?

Answer: A complete repair involving leak detection, fixing the leak point, pressure testing, system evacuation, and refrigerant recharge typically takes two to three hours for a straightforward single leak point. Simply adding refrigerant without finding and repairing the leak takes much less time, but is not a lasting fix and should be avoided, since the same cooling problem will return once the refrigerant escapes again.

Question: What is the difference between a refrigerant leak and a dirty coil causing poor cooling?

Answer: A dirty or blocked condenser coil restricts airflow, which causes the system's operating pressure to rise and can trigger protective shutdowns or short cycling, where the compressor runs briefly and then stops repeatedly. A refrigerant leak, by contrast, typically causes the compressor to run continuously without cycling, while cooling output remains consistently weak because there is simply not enough refrigerant circulating to absorb and release heat effectively. The two causes require different diagnostic approaches — airflow and pressure assessment for coil issues, and pressure measurement combined with leak detection for refrigerant issues.

Conclusion

Mohit Bansal's third AC issue of the season arrived at the worst possible time — the middle of Aligarh's harshest heatwave week, with his elderly mother in the house and a unit that simply could not keep up anymore.

What looked at first like the unit finally giving out under the heat turned out to be a slow refrigerant leak that had been quietly developing for months, only becoming obvious once the extreme temperatures removed any margin for error.

Finding the Best AC Service in Aligarh for the third time this season meant the diagnosis happened the same way it had each time before pressure measured directly, the actual cause confirmed rather than assumed, and a permanent repair rather than a temporary top-up.

If your split AC is running constantly without properly cooling the room especially if this is happening during a heatwave after working fine for most of the season  it is very likely a refrigerant issue, and a same-day Split AC Service Aligarh visit is the only way to confirm it and fix it properly before the next heatwave finds the same weak point again.

Keep Your Split AC Running Efficiently in Aligarh

If your Split AC is taking longer to cool, producing weak airflow, leaking water, or causing unusually high electricity bills, it may be time for professional servicing. Regular maintenance helps improve cooling performance, extends the life of your AC, and prevents costly breakdowns during the peak summer season.

Boomzo provides trusted Split AC Service in Aligarh, including deep cleaning, gas pressure checks, filter cleaning, coil maintenance, water leakage solutions, and complete system inspections. Our experienced technicians ensure your AC delivers powerful cooling, better energy efficiency, and reliable performance throughout the season.

Whether you need routine maintenance, urgent repairs, or a complete Split AC service, Boomzo is ready to help with fast and professional support.

📞 Call us: +91 843 991 1779

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Book your Split AC Service in Aligarh today and enjoy faster cooling, lower electricity bills, cleaner air, and uninterrupted comfort all summer long.