NAA CAMT common mistakes
NAA CAMT · Understand the traps and how to avoid them.
Closing work orders with a note like 'fixed' or 'done' - no symptom description, no parts listed, no test result, and no resident confirmation.
The technician treats the work-order queue as a to-do list to clear before shift end and has no documentation habit; writing notes feels like paperwork rather than part of the repair.
What to do instead
Use a fixed three-line note: (1) what was found, (2) what was done and which parts were used, (3) how it was tested and the result. Read the note back to the resident or leave a completion notice, and never close the order without a test-result line.
Scheduling a reported 'slow drain' or 'water on the floor' as a routine call days out without asking triage questions.
Dispatch habits and familiarity make every call look routine; there is no standard triage script, so active leaks and sewage backups get queued behind non-emergencies.
What to do instead
Apply a triage script on every call: Is water actively running? Is it rising? Is it sewage? Is it near electrical panels or outlets? Is there no water at all? Any 'yes' to active leak, sewage, or electrical contact escalates to emergency response immediately.
Hanging cabinets, TV mounts, or heavy shelving with drywall anchors or screws driven only into drywall, then returning later for sagging or pull-out.
The substrate is never identified before fastening; anchor packaging is trusted at face value and the load rating is not matched to the actual wall assembly.
What to do instead
Locate framing with a stud finder or tap-and-probe before drilling. Fasten heavy loads to studs or installed blocking; where no framing exists, use toggles or anchors rated above the load and record the fastener used on the work order.
Filling soft, rotted exterior wood or a failing joint with caulk or spackle and painting over it instead of replacing the substrate.
The visible symptom disappears quickly, so the repair looks finished; the technician has not checked for the moisture source or probed the wood for soundness.
What to do instead
Probe the wood with an awl; cut out and replace any soft or crumbly material, prime cut ends, and reattach with correct fasteners. Find and correct the water path (grade, flashing, gutter, sealant joint) before painting, and remove old sealant and clean the joint before recaulking.
Wrapping PTFE tape on flare-fitting threads or over-tightening a compression nut to stop a leak.
Threaded-pipe sealing habits are carried over to flare and compression joints; more torque feels safer, and the technician does not know where each fitting actually seals.
What to do instead
Remember where each fitting seals: flare fittings seal metal-to-metal at the cone, so no tape on the threads and tighten to spec; compression fittings seal at the ferrule, so hand-tight plus one-quarter to one-half turn. If it still leaks, disassemble, inspect the cone or ferrule, and remake or replace the fitting rather than adding torque.
Removing a faucet, valve, or supply line without first proving the shutoff holds, then flooding the unit when the angle stop will not close.
The angle stop is assumed to work; there is no test step, and older stops that have not been operated in years are common.
What to do instead
Before disassembly, close the stop, open the fixture, and confirm flow actually stops. If it does not, shut the unit or building main, or use a freeze or plug method. After the repair, re-open slowly and check every joint under pressure.
Resetting or upsizing a breaker that keeps tripping, or working a circuit live because 'it is just a switch.'
Time pressure and overconfidence; a tripping breaker is treated as an annoyance rather than a symptom, and de-energizing is seen as a delay.
What to do instead
De-energize, lock and tag the breaker, and verify dead with a tester at the point of work before touching conductors. For a tripping breaker, isolate loads and check for ground faults and overloads; replace only with the same rating matched to the conductor size, never a larger one.
Replacing appliance parts one after another by guessing which component matches the symptom, without meter tests or reading the fault code.
The symptom resembles a familiar failure; the technician lacks a diagnostic sequence and uses parts substitution as diagnosis.
What to do instead
Follow a set sequence: verify supply power and voltage, pull and interpret the fault code, then test the suspect component against its specification with a meter before replacing it. Change one part at a time, retest, and record the measured readings on the work order.
Adding refrigerant to a system on low suction pressure alone, without a leak search or superheat/subcooling measurement.
Low suction is assumed to mean low charge; gauges are read without pipe temperatures, and leak searching is skipped because it takes longer.
What to do instead
Leak-search first, repair, evacuate, and weigh in the charge per the nameplate. Verify with superheat or subcooling and a supply-to-return temperature split; document the measured values rather than 'topped off refrigerant.'
Pulling an HVAC disconnect or servicing electrical equipment without lockout/tagout, and skipping the heat-exchanger and carbon-monoxide check because the call was for cooling.
The service focus narrows to the reported symptom; safety steps are treated as a separate task rather than part of every service call.
What to do instead
Pull the disconnect, lock and tag it, and verify dead at the unit before work. On every furnace visit, inspect the heat exchanger, perform a combustion and CO test in the flue and occupied space, and document the results along with the lockout steps taken.