Search
-
HVAC Equipment
-
Ductless Mini Splits
- Ductless Mini Splits
- Shop By Zone
- Shop by BTU
- Shop By Brand
- Components
- Accessories
-
HVAC Parts & Supplies
- HVAC Parts & Supplies
- HVAC Supplies
- HVAC Tools
-
HVAC Replacement Parts
- Blower Housing & Assemblies
- Blower Wheels
- Breakers, Contactors & Disconnects
- Capacitors & Transformers
- Control & Circuit Boards
- Filter Driers & Accumulators
- Gas Valves & Conversion Kits
- Heat Exchangers
- Thermal Expansion Valves (TXV)
- Temperature Controls
- Wall Brackets & Parts
- Miscellaneous Parts
- O-Rings & Gaskets
- Hydronics
- Motors
- Thermostats & Zoning
-
Plumbing
-
Pool
-
Electrical
-
Air Quality
-
Tools & Supplies
-
Door Security & Hardware
MARS 39004 390 Series SPDT Changeover Switch
Availability:
In Stock
Ships same day if ordered by 12 pm
Greater Chicago, IL area
If ordered prior to 4pm CT (Mon-Fri)
- $46.63
- $46.63
- Unit price
- / per
✓
Better Price in Cart
Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Manuals:
-
Secure Payments
-
Easy Returns
-
Expert Advice
-
Fast Shipping
Product Description
The MARS 39004 changeover switch is designed for the summer-winter transition of electric thermostats in hydronic heating and cooling fan-coil systems. This switch features color-coded leads for straightforward installation and a sealed SL-8 thermostat for reliable performance.
- Color-coded leads simplify installation
- Sealed case for the SL-8 thermostat enhances durability
- Can be mounted in any orientation
Product Highlights
This switch is ideal for HVAC professionals seeking a dependable solution for controlling climate systems efficiently.
Product Information
Standard Information
- Manufacturer: MARS
- MPN: 39004
Technical Specifications
Complete your install
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
Loading install accessories...
Add install kit to cart
—
Related Products
- Choosing a selection results in a full page refresh.