NVQ L4 Automobile AC Technician case studies
NVQ L4 Automobile AC Technician · Put your knowledge to work in context.
The NVQ Level 4 Automobile Air Conditioning Technician is a competence-based qualification for experienced mobile AC practitioners who service, diagnose and repair vehicle climate systems and handle refrigerants under regulation. It suits technicians moving from routine regas work into diagnostic decision-making, supervision and compliance responsibility. The NVQ L4 Automobile AC Technician case studies are 5 cases and about 4,961 words.
1A2L Refrigerant Release Next to Hot Work in a Shared Bay
It is a Tuesday afternoon in July, the bay doors are closed and the workshop ambient is 31 °C. A 2022 hatchback with a 480 g R1234yf charge is in bay 2 for a poor-cooling complaint.
1,009 words, about 5 min2Recovery Cylinder Beyond Its Fill Limit With Unknown Contents
It is Friday 17:40 and the workshop is closing. The only R134a recovery cylinder stands on the scales in the cylinder store, which is at 33 °C.
959 words, about 5 min3Cooling That Fades After Twenty Minutes
A 2017 diesel estate with an R134a system labelled at 590 g comes in with a complaint that the air conditioning blows cold for the first 15–20 minutes of a motorway run and then fades to ambient, and is cold again the next morning. Ambient is 28 °C with high humidity.
1,015 words, about 5 min4Vacuum Decay After a Condenser Replacement
After a low-speed front-end impact, a 2019 hatchback with an R1234yf system (label charge 620 g) has had its condenser, receiver-drier and two O-rings at the condenser connections replaced. The system is reassembled and evacuated at 22 °C and 65 % relative humidity.
916 words, about 5 min5AC Request Refused, Two Sensors Already Fitted
A 2020 SUV with automatic climate control and an R1234yf system comes in for the second time with 'no cold air'. On both previous visits the workshop fitted a new refrigerant pressure sensor after reading a code for 'pressure sensor circuit low', cleared the code, and the air conditioning worked in the bay.
1,062 words, about 5 min