Free checklist
Electric duct heater quarterly maintenance checklist
A quarterly electric duct heater 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 NEC (NFPA 70), IMC (mechanical code), manufacturer's published instructions. Confirm the edition your authority having jurisdiction has adopted.
- Items
- 4
- Photos required
- 7
- Built for
- Subcontractors
Who runs it
The HVAC or maintenance tech on the quarterly mechanical round.
When in the schedule
Every quarter through the heating season, walked with the air handler that serves the duct. The heater only energizes with airflow, so a fan problem shows up here.
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.
Elements and terminations
- 2 photos
Elements and terminal block inspected with power locked out
Element coils intact and not sagging into the duct wall, terminal lugs tight with no heat discoloration or melted insulation, control wiring landed.
- 1 photo
Each heating stage confirmed energizing on a call
Every stage draws current on a call for heat, no stage dead, contactors pulling in cleanly without chatter.
Airflow proving
- 2 photos
Airflow interlock proves before elements energize
Sail switch or differential pressure proving observed making before any stage energizes and dropping the heater when airflow stops — observed and documented, never jumpered.
Safety cutouts
- 2 photos
High-limit cutouts present, wired and reset
Automatic and manual high-limit cutouts in place and landed, manual reset button not tripped, no evidence a limit has been defeated or taped.
What usually sends this back
The failures are almost always the evidence, not the work
- Heater energizing with weak or no airflow because the sail switch or pressure proving is sticking — a life-safety interlock issue that gets documented, never bypassed.
- Discolored or loose lugs at the terminal block from heat cycling, found by staining before they arc.
- A blown element leaves a stage dead, so the space underheats and nobody knows which stage dropped.
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 electric duct heater quarterly checklist cover?
- 4 items across 3 sections, covering elements and terminations, airflow proving, safety cutouts. 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 maintenance tech on the quarterly mechanical round.
- When in the schedule should this walk happen?
- Every quarter through the heating season, walked with the air handler that serves the duct. The heater only energizes with airflow, so a fan problem shows up here.
- Why does every item ask for a photo?
- 7 of the 4 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 electric duct heater quarterly inspection?
- Heater energizing with weak or no airflow because the sail switch or pressure proving is sticking — a life-safety interlock issue that gets documented, never bypassed. Discolored or loose lugs at the terminal block from heat cycling, found by staining before they arc. A blown element leaves a stage dead, so the space underheats and nobody knows which stage dropped.
- 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.
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