Free checklist
Motorized control damper quarterly maintenance checklist
A quarterly control damper round is short on purpose: it catches the wear items that fail between annual services. This checklist is sized for a tech with a phone. Every item says what to look at and the photo that proves the round happened. Work is commonly verified against IMC, manufacturer's published instructions. Confirm the edition your authority having jurisdiction has adopted.
- Items
- 5
- Photos required
- 7
- Built for
- Subcontractors
Who runs it
The HVAC or controls tech on the quarterly air-side round, at the air handler and at zone dampers.
When in the schedule
Every quarter with the air-handler and economizer checks, since a damper that won't fully open or close skews mixed-air control until someone strokes it.
The checklist
Every item, and the photo that proves it
The photo count on each row is what RTI would require before the item can be submitted. Copy the list as is, or load it into RTI and let the gate enforce it.
Actuator and stroke
- 2 photos
Full open and closed stroke observed
Damper driven to both end positions and the blades watched through the full travel, actuator not stalling or slipping short of either stop.
- 1 photo
Linkage and shaft coupling checked
Crank arm and linkage tight on the shaft, no slop or slipped setscrew, actuator securely mounted with no play at the coupling.
Blades and seals
- 2 photos
Blade seals and edge closure checked
Blade edge and jamb seals intact, blades meeting evenly at full close, no daylight or airflow felt through a commanded-closed damper.
Controls and feedback
- 1 photo
Feedback compared against command
Position feedback at the controls checked against the actual blade position at several commands, not just the two extremes.
- 1 photo
Control signal confirmed at the actuator
Control signal reaching the actuator and the blades responding proportionally, no reversed action or dead band at mid-stroke.
What usually sends this back
The failures are almost always the evidence, not the work
- Position feedback reads full open at the controls while the blades are only part way because the linkage has slipped on the shaft.
- Outside-air damper commanded closed but blade seals worn, so it leaks cold air into the mixed-air plenum all winter.
- Actuator humming against a bound linkage, drawing current but not moving the blades through their full stroke.
Run it with the Photo Gate
A checklist nobody can submit half-finished
Load this list into RTI, stick a QR tag on the area it covers, and the submit button stays locked until every mandatory item is answered and the 7 required photos exist. Approved walks roll into a branded turnover package with a tamper-evident record behind every line.
Submission state
The gate is enforced on the server, so it holds even if the phone is offline when the walk happens.
Verified against
Common questions
- What does this motorized control damper quarterly checklist cover?
- 5 items across 3 sections, covering actuator and stroke, blades and seals, controls and feedback. Each item spells out what the person walking the job is actually looking for, not just a box to tick.
- Who should run this inspection?
- The HVAC or controls tech on the quarterly air-side round, at the air handler and at zone dampers.
- When in the schedule should this walk happen?
- Every quarter with the air-handler and economizer checks, since a damper that won't fully open or close skews mixed-air control until someone strokes it.
- Why does every item ask for a photo?
- 7 of the 5 items call for photo evidence. A checklist answer without the photo is a claim; the photo is what makes the record worth something in a dispute and lets a reviewer approve work without re-walking the job.
- What most often fails a motorized control damper quarterly inspection?
- Position feedback reads full open at the controls while the blades are only part way because the linkage has slipped on the shaft. Outside-air damper commanded closed but blade seals worn, so it leaks cold air into the mixed-air plenum all winter. Actuator humming against a bound linkage, drawing current but not moving the blades through their full stroke.
- Can I use this checklist in RTI?
- Yes. Start a free RTI workspace, build this list as a checklist, and the Photo Gate holds the submit button until every mandatory item is answered and its photos are attached. Approved inspections roll into a branded turnover package with a tamper-evident audit trail.
Related checklists
2642 items and 4211 photo requirements in total.