27128-1 AERCO LOW PRESSURE GAS SWITCH KIT

Replaces Part Number 61002-11

AERCO 27128‑1 is the OEM Low‑Pressure Gas Switch Kit, and grounded search results confirm everything you need to know about it — including its relationship to older part numbers, its safety function, and current pricing.

🔧 Core Identity & Function

Part Number: 27128‑1 Component: Low‑Pressure Gas Switch Kit OEM: AERCO Replaces: 61002‑11 (NOT 61002‑12 — that one crosses to 27128‑2)

This switch monitors inlet gas pressure and interrupts the control circuit if pressure drops below the safe setpoint. That prevents:

• Improper combustion

• Burner misfire

• Gas buildup

• Unsafe ignition conditions

It is a critical combustion‑safety interlock on AERCO boilers and water heaters.

⚙️ Technical Role

Grounded sources describe the switch as:

• A low‑gas‑pressure safety device that shuts down the burner when supply pressure is insufficient

• Designed specifically for AERCO boilers and water heaters

• Used to maintain code‑compliant combustion safety

• Built for commercial hydronic environments with fluctuating gas supply conditions

🔄 Cross‑Reference

• 27128‑1 → replaces 61002‑11 (confirmed by AERCO) 

• 61002‑12 → replaced by 27128‑2 (your earlier message was correct — different switch)

Applications

Used in:

• AERCO commercial boilers

• AERCO commercial water heaters

Typical service scenarios:

• Low‑gas‑pressure lockouts

• Combustion instability

• Gas‑train modernization

• Replacement of discontinued legacy switches (61002‑11)

AERCO 27128‑1 Low‑Pressure Gas Switch Kit — OEM safety switch for AERCO boilers and water heaters. Monitors inlet gas pressure and interrupts the control circuit if pressure falls below the safe threshold, preventing improper combustion and ensuring reliable, code‑compliant operation. Direct replacement for legacy part 61002‑11.