The evaporator (indoor) coil on this 10 ton package AC unit was filthy,improperly sized filters had been jammed in the filter rack allowing dirty air to bypass.The restriction in airflow has caused the compressor to ice up,and has allowed suction pressures to drop to unsafe levels.The valves in this compressor have been damaged and the compressor will have to be replaced.The $65 this building owner saved by not cleaning their evaporator coils cost them $4,500 for a new compressor.

The previous maintenance provider for this customer did not include belt changes as part of their service.When we were called to investigate a lack of cooling, we found that the old and cracked fan belt had broken,wrapped itself around the drive sheave,and beat the evaporator coil until it was destroyed.In this case not replacing a $15 belt cost the customer $7,000 in a coil replacement.All our maintenance contracts include the option of annual automatic belt replacement.We use high quality notched belts,which cost a little more but are less prone to breakage and save energy when compared to standard V section belts.

Improperly tightened belts are also a service call waiting to happen – this picture shows a very typical situation we find during an initial contract startup.

This large fan shaft bearing failed due to age and lack of lubrication.When it failed,it destroyed the fan shaft and fan wheel.This expensive repair could have been avoided if the customer had a preventive maintenance contract in place.This bearing took many months to fail, and would have been giving a clear indication that it required attention for many months prior to actually failing (notice the deep groove in the bottom left side of the casting).We would much rather proactively replace a bearing before it fails,than to re-build an entire fan assembly afterwards.

This damper motor looks perfectly good,however it has failed with the damper in the open position.A complete checkout of the control system during a preventive maintenance visit saved the customer from excessive utility costs.This damper (the outside air damper in a 25 ton system with electric heat),stuck open for a month in January,would have cost the customer over $8,500 in wasted electricity if we had not found and solved the problem during our maintenance inspection.

Our service planners will custom tailor a program that will meet your needs, taking into account your goals, objectives, and budget. We can provide maintenance services on demand, on a scheduled basis, or on a completely turn key basis where all system costs are fixed to a monthly or quarterly fee. Most importantly, when you use us to maintain your equipment, you can rest assured that the work is actually getting done. 

Please contact one of our service planners if you would like more information.