One of the most common questions we hear from building owners and facility managers is:
“If I just paid for preventative maintenance, why do I need another service call?”
It’s a fair question.
After all, the purpose of preventative maintenance is to keep your HVAC system operating efficiently and reduce the likelihood of problems. In an ideal world, every maintenance visit would end with a clean bill of health and no further action required.
The reality is that while a successful preventative maintenance visit often do not require a follow-up service call, there are situations where one becomes necessary. The important thing is understanding why.
Sometimes Maintenance Uncovers Existing Problems
Preventative maintenance is designed to identify issues before they become major failures.
Many equipment problems develop gradually. A failing capacitor, worn contactor, refrigerant leak, damaged ductwork, or clogged condensate line may not have caused an obvious issue before the maintenance visit. Often times these problems arise not because a sufficient preventative maintenance was not performed, but because the systems age and these problems arise over time. When considering which repairs are a result of an aging system, there are several common repairs. On the electrical side, capacitors, contactors, and start kits will fail over time. Ductwork will sometimes become damaged by rats or rodents. Condensate lines will clog due to the condensation and dirt that falls from the evaporator coils. Condensate lines may actually clog because a preventative maintenance was performed. If your condensate line was dry due to dirty coils and low condensation, the rush of condensate following clean coils can cause dry build up in the lines to become wet, expand, and clog the lines. Finally, refrigerant pressures may adjust once coils become cleaned or ambient temperatures change. Should the pressures drop and additional refrigerant is required, that does not necessarily indicate an improper preventative maintenance. When a technician performs a thorough inspection, these problems can arise naturally.
In these cases, the service call isn’t the result of poor maintenance. The maintenance process simply revealed a problem that was already there.
Think of it like an annual physical. Your doctor may discover an issue that requires further treatment, but that doesn’t mean the exam caused the problem. It means the exam helped identify it before it became more serious.
On the other hand, there are some repairs that should not happen following preventative maintenance. The condensate line should not be clogged before the technician leaves. It should be unlikely that major components fail (e.g. fans, motors, compressors) because technicians should be testing amp draws during their visit. Filters should not be dirty. Finally, if a customer wants a technician to check pressures during every visit, any refrigerant leaks should be identified after two successive preventative maintenance visits. As an aside, some customers prefer technicians do not check pressures because some refrigerant leaks every time a technician applies tools to the system.
Sometimes Human Error Is Involved
Even the best technicians occasionally make errors. HVAC systems are complex, and maintenance involves dozens of inspection points and procedures. A step may be overlooked, a component may not be tested correctly, or a cleaning process may not be completed as thoroughly as intended.
Some examples might include:
- An air filter not being properly installed or replaced
- An evaporator coil not being cleaned thoroughly
- Condenser coils not being serviced effectively
- Condenser fins not being straightened when necessary
- Drain lines not being fully flushed
- Capacitors or contactors not being tested correctly
- Ductwork not being inspected for leaks or damage
- Temperature readings not being properly documented
- Condensate pumps not receiving a complete operational inspection
While these situations are uncommon, no company is immune from human error. The true measure of a service organization is not whether mistakes ever happen, but how quickly they are identified, addressed, and prevented from recurring.
How We Work to Minimize Service Calls
At Frank Gay Commercial, minimizing service calls start with having the right processes in place. We adhere to a 21 point maintenance checklist in order to ensure a system is left as intended. Our goal is simple: complete preventative maintenance correctly the first time and provide customers with accurate information about the condition of their systems.
The Bottom Line
A preventative maintenance visit should not automatically result in a service call. However, there are legitimate reasons why one may occasionally be required.
Sometimes maintenance uncovers hidden problems. Sometimes equipment conditions change between visits. And yes, sometimes human error plays a role.
The key is working with a service partner that is committed to accountability, continuous improvement, and honest communication.
At Frank Gay Commercial, we believe our customers deserve transparency. If a service call is recommended after maintenance, we’ll explain exactly why, what was found, and what options are available so you can make the best decision for your facility.
Because great service isn’t just about maintaining equipment. It’s about earning trust.
