HVAC MECHANIC II

SUPERVISION

The HVAC Mechanic II reports to the HVAC Maintenance Supervisor or Assistant Supervisor, receiving assignments through work orders, schedules, and service calls that typically specify the objectives, priorities, and deadlines of the task. Once assignments are received, the employee is responsible for planning and carrying out recurring and routine journey-level HVAC tasks independently, applying established trade practices and accepted procedures to diagnose and resolve component-level issues. The incumbent exercises keen judgment to determine when unfamiliar, atypical, or system-level conditions that require referral to the HVAC Mechanic III or the supervisor. As a level II professional, the employee may provide basic guidance to temporary workers or HVAC Mechanic I personnel in the course of daily work. Review of work is generally limited to periodic checks for technical adequacy, completion of assignments, compliance with procedures, and overall customer satisfaction, reflecting both the employee’s independence in performing standard work and the requirement to seek supervisory direction when assignments exceed journey-level responsibility.

DISTINGUISHING CHARACTERISTICS

The HVAC Mechanic II is a journey-level classification in the HVAC series, where assignments involve a full range of standard HVAC tasks that require the employee to apply established trade methods, interpret straightforward technical information, and resolve routine or moderately complex equipment issues in conditions that are typically clear-cut and familiar. In carrying out these assignments, the HVAC Mechanic II considers known procedures, manufacturer guidance, and standard diagnostic steps to determine what must be done, exercising judgment to identify component-level problems while referring atypical, unclear, or system-wide issues to the HVAC Mechanic III or supervisor. 

The work requires analyzing equipment symptoms and choosing the most appropriate course of action from established options, while progressively building the skill to recognize when issues exceed standard practice and must be elevated because they involve developing new techniques, interpreting incomplete or conflicting building-wide data, or making decisions that require advanced diagnostic reasoning. Tasks that involve higher skill or more variable conditions are performed only under direction or by HVAC Mechanic III personnel. Although the employee may support senior technicians on complex assignments, the HVAC Mechanic II does not function as a technical expert or project lead, and the nature of the work provides limited opportunities for deviation from established practices or the creation of new methods.

GUIDELINES

The HVAC Mechanic II performs work using a wide range of guidelines, including Federal, State, and County regulations governing HVAC work such as environmental protections, workplace safety requirements, building code provisions, APS policies and procedures, manufacturer specifications, preventive maintenance schedules, and standard HVAC industry practices. These guidelines provide clear and generally applicable direction for most journey-level tasks, and the employee is responsible for selecting the appropriate reference and applying it correctly to routine and moderately complex assignments. The work is performed within well-established parameters and the employee must exercise judgment in determining when a guideline does not fully address the situation or when conditions fall outside typical component-level troubleshooting. In such cases, particularly when advanced diagnostics, system-level analysis, or control-related decisions may be required, the HVAC Mechanic II seeks guidance from the supervisor or HVAC Mechanic III rather than altering or creating new procedures independently.

CONTACTS

The HVAC Mechanic II has regular contact with coworkers in Maintenance Services, school-based staff such as principals and building managers, vendors, contractors, and occasionally County inspectors. These contacts typically occur under routine circumstances and involve exchanging information about work status, clarifying HVAC issues, coordinating access to equipment or spaces, and providing customer service related to comfort concerns or maintenance activities. While most interactions are straightforward and based on established roles, the mechanic must at times explain technical findings to individuals who may be unfamiliar with HVAC operations, respond to staff who may be frustrated by equipment outages, or coordinate with contractors whose schedules or priorities differ from those of APS. The nature of these contacts requires the employee to communicate clearly, use tact and professionalism, and adapt explanations to the audience in order to resolve problems effectively and maintain positive working relationships. 

ESSENTIAL FUNCTIONS

Installs, maintains, and repairs HVAC equipment such as air handlers, unit ventilators, pumps, motors, fans, valves, pneumatic/analog controls, terminal units, and HVAC accessories.

Troubleshoots components and subsystems to identify faults such as failed motors, faulty switches, clogged coils, failed belts, and refrigerant leaks.

Performs routine preventive maintenance including filter changes, lubrication, coil cleaning, belt replacement, tightening electrical connections, and condensate system cleaning.

Assists HVAC Mechanic III staff with maintenance and repair of chillers, boilers, cooling towers, and large commercial systems by gathering readings, preparing tools, and carrying out directed tasks, and identifies when conditions require system-wide diagnostics.

Performs routine hydronic maintenance, including bleeding air, replacing gaskets, checking valve operation, and assisting with basic hydronic balancing procedures.

Recovers refrigerant, repairs minor leaks, evacuates equipment, and recharges units in accordance with EPA requirements, maintaining required documentation.

Performs brazing and soldering on piping for routine repairs and reports control failures or unusual operating trends to the HVAC Mechanic III or supervisor.

Uses the BAS/EMS interface at the operator level to start and stop equipment, view point status, acknowledge alarms, and make basic comfort adjustments within established limits.

Reads and interprets basic schematics, wiring diagrams, and manufacturer manuals, and uses test instruments such as multimeters, ammeters, airflow meters, and manifold gauges.

Cuts, threads, and installs piping; installs ductwork and diffusers; and assembles mounting hardware and structural supports.

Investigates heating or cooling complaints by checking room conditions, taking equipment readings, verifying component operation, and reporting issues that exceed journey-level scope.

Communicates with school-based staff in a courteous, responsive, and customer-service-oriented manner.

Completes scheduled preventive maintenance tasks following APS procedures and manufacturer recommendations.

Identifies worn or failing components and reports them for corrective work orders, providing observations to support HVAC Mechanic III recommendations for system optimization or preventive maintenance improvements.

Completes work orders accurately, documenting labor, parts used, refrigerant recovery/charging, and system conditions.

Maintains stock, requests needed materials, and performs basic shop-keeping duties and vehicle inspections.

Handles refrigerants, chemicals, and fuel products safely and follows all applicable safety procedures, including PPE requirements, lockout/tagout, and confined-space protocols.

Ensures work sites are safe, clean, and properly restored after tasks, and may provide informal guidance to lower-level personnel.

Performs other duties as assigned, consistent with the scope and purpose of the position.

PHYSICAL ATTRIBUTES

Work requires moderate to heavy physical effort, including standing, walking, bending, stooping, kneeling, reaching, and positioning oneself to access and service equipment in tight or awkward spaces. The employee frequently uses stairs, ladders, extension ladders, scaffolding, and lifts, and must lift, push, pull, or carry objects up to 50 pounds independently and 100 pounds or more with assistance or mechanical support.