Description
The Mars 33217 is a 240V heat sequencer engineered for dependable staged operation in electric heating systems. Heat sequencers are essential components in electric furnaces and air handlers, preventing simultaneous energization of all heating elements — which would otherwise cause excessive current draw, nuisance tripping of breakers, and premature component wear.
How It Works
The Mars 33217 uses a bimetal heating element to introduce a time delay between the activation of successive heating stages. This staggered start-up smooths out the electrical load, protects wiring and overcurrent devices, and extends the service life of the entire heating system.
Key Features
- 240V operating voltage — compatible with standard residential and light commercial electric heating equipment
- Staged sequencing action prevents simultaneous element energization for reduced inrush current
- Bimetal time-delay design for consistent, repeatable switching performance
- Direct replacement for failed or worn heat sequencers in electric furnaces and air handlers
- Compact form factor for straightforward installation in existing equipment
- Manufactured by Mars — a trusted name in HVAC electrical components
Typical Applications
- Residential electric forced-air furnaces
- Electric air handlers with multiple heating elements
- Light commercial electric heating equipment operating at 240V
Why Choose Mars?
Mars has been a reliable supplier of HVAC electrical components for decades, offering products built to meet the demands of professional HVAC technicians and contractors. The 33217 is a quality replacement sequencer designed to restore proper staged heating operation quickly and efficiently.
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