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Detailed homeowner guides explain safe checks, possible causes and when to request professional diagnosis.
Search what you observe—not what you think the failed part is. Several HVAC faults can produce the same symptom, and an on-site diagnosis is often needed before choosing a repair.
15 matching answers
Clear filtersRefrigerant is the working fluid that absorbs and releases heat as it circulates through the refrigeration system. It should remain in a sealed circuit during normal operation.
No. Refrigerant circulates in a closed system; a low charge usually indicates a leak, incorrect initial charge or service issue rather than normal consumption.
R-22 is an older HCFC refrigerant formerly common in residential AC and heat pumps. New R-22 systems are no longer sold, but existing equipment may still be serviced using recovered/reclaimed or previously produced refrigerant.
Existing R-22 equipment can still be serviced, but refrigerant availability, repair cost, age, efficiency and the condition of the system should be considered when deciding whether repair is economical.
R-410A is an HFC refrigerant widely used in many residential systems after R-22. It does not deplete ozone, but it has climate impact and must be handled under refrigerant-management rules.
Some newer lower-global-warming refrigerants are classified as mildly flammable and require equipment specifically designed and listed for them. Refrigerants must never be substituted casually into incompatible equipment.
Do not use unapproved hydrocarbon products marketed as drop-in R-22 replacements in residential AC equipment. EPA has warned that products such as R-22a blends can be highly flammable and unsafe in systems not designed for them.
EPA Section 608 requirements apply to technicians who service equipment containing regulated refrigerants. Refrigerant recovery and service should be performed by properly certified technicians.
Incorrect refrigerant charge can reduce capacity and efficiency and may damage equipment. Charge should be evaluated using manufacturer procedures and operating conditions.
Low refrigerant can contribute to abnormal coil temperatures and icing, but restricted airflow can do the same. A technician should diagnose the cause rather than assume refrigerant is low.
Many leaks can be located and repaired, but the best choice depends on leak location, equipment age, refrigerant type, repair accessibility and overall system condition.
Federal rules prohibit knowingly venting many refrigerants during service and disposal. Certified technicians use recovery equipment to capture refrigerant for proper handling.
Equipment nameplates and manufacturer documentation often identify the designed refrigerant. Do not rely on hose fittings or assumptions; verify the label and service documentation.
Efficiency is determined by the complete equipment design and rating, not by simply swapping refrigerants. Refrigerant conversion outside manufacturer-approved procedures can be unsafe and damage equipment.
Regulatory transitions generally affect manufacturing, new equipment and refrigerant supply over time; they do not automatically make every existing system illegal to operate. Repair economics and parts/refrigerant availability should be evaluated case by case.
Equipment condition still requires professional evaluation. For regulations, rebates and efficiency guidance, Heco checks authoritative sources and identifies items that can change.
Tell Heco the symptom, equipment type, property type and location. We will help identify the next practical step.