Flame Rollout Switch 4349806 Replacement For HH18HA452 Fits Carrier 58MCA 340AAV 340MAV And Bryant 340AAV 036040 CSA Payne 352MAV 048100 FCKA 95320156 HH18HA252
✔️ Replacement for HH18HA452; compatible with Carrier and Bryant units.
This Flame Rollout Switch is a furnace safety device that detects flame rollout or blocked airflow and cuts gas flow to prevent fires. It is used in Carrier, Bryant, and Payne furnaces with compatible limit switch configurations.
✅ Replacement part for HH18HA452: Carrier 58MCA, 340AAV, 340MAV; Bryant 340AAV 036040 CSA; Payne 352MAV 048100 FCKA; replaces 95-320156, HH18HA252
✅ Activation threshold 250°F (121°C) with normally closed contacts
✅ Durable, moisture and dust resistant; handles furnace vibrations and temperature swings
✅ Simple installation: power off, copy wiring, mount, rewire, test
✅ Pack: 1 replacement switch per order
💡 What is a flame rollout switch and why is it important for furnace safety? In short, it acts as a safety cutoff that stops gas or power when rollout is detected.
- It prevents fires by cutting the burner operation when rollout is detected
- It protects the heat exchanger from damage due to excessive heat
- It’s a handy replacement part for many Carrier, Bryant, and Payne furnaces