Digital 8-Button Spaside Control panel
About This Part
Digital 8-Button Spaside Control panel — a genuine Balboa replacement part for spas and hot tubs. Part #53503.
This is an authentic Balboa component, stocked and shipped by Sauna Company USA. Order genuine Balboa part #53503 online with fast shipping, secure checkout, and expert support from our parts team.
- Manufacturer: Balboa
- Part Number: 53503
- Category: Controls & Spa Paks › Spa Controls › Topsides & Keypads
- Availability: Regular Stock
Detailed Description
The Balboa 53503 is an ML551 digital topside control panel designed for hot tubs and spas using Balboa EL or GL series control systems. This unit features an LCD screen, an 8-pin Molex plug with a 7-foot cord, and does not include a graphic overlay.
Key Specifications
- Model: ML551Part Number: 53503-04 (also referenced as 53503)
- Compatibility: Balboa EL and GL series spa control systems
- Connection Type: 8-pin Molex plug
- Cord Length: 7 feet
- Panel Dimensions: Approx. 7-3/8" x 3-1/4" (cutout size roughly 7-1/4" x 3-3/8")
- Buttons: 8 buttons total
- Display: LCD
- Ships from the USA
- Secure checkout
- Lowest price guaranteed
Specifications
| Model | ML551Part Number: 53503-04 (also referenced as 53503) |
|---|---|
| Compatibility | Balboa EL and GL series spa control systems |
| Connection Type | 8-pin Molex plug |
| Cord Length | 7 feet |
| Panel Dimensions | Approx. 7-3/8" x 3-1/4" (cutout size roughly 7-1/4" x 3-3/8") |
| Buttons | 8 buttons total |
| Display | LCD |
Related Spa Controls
Browse more: Spa Controls · All Balboa parts
Technical Specifications
| Part Number | 53503 |
| Brand | Spa Parts |
| Item Type | Part |
| Category | 53503,Balboa,Controls & Spa Paks,Part #53503,Spa Controls,Topsides & Keypads |
| Shipping Method | Standard parcel |
| Availability | In Stock |
Contact us to confirm compatibility with your specific model before ordering.
Installation Overview
Control system installation — low-voltage signal wiring; typically DIY-friendly. Consult the included manual for model-specific diagrams.
- Power down the steam generator at the breaker before working with any wiring.
- Mount the control unit at the desired wall location (typically inside or adjacent to the steam room, at accessible height).
- Route the signal cable from the control to the generator junction box — keep away from high-voltage wiring.
- Connect the wires to the labeled terminals on both the control and the generator (typically color-coded or numbered).
- Secure all cable runs with clips or conduit as required by local code.
- Restore power and follow the pairing/commissioning sequence in the manual.
- Test all functions: heat, timer, aromatherapy (if equipped), and indicator lights.
Compatibility & System Requirements
This part is designed for use with:
- Spa Parts Products
Control compatibility: Steam generators have a specific control protocol. Mix-and-match between brands is not supported. Verify the exact control family (e.g., AirTempo vs. iSteamX) matches your generator.
Not sure if this fits your system? Contact us with your model number and we'll confirm before you order.
Frequently Asked Questions
Will this control work with my existing generator?
Controls are brand- and family-specific. An AirTempo control only works with AirTempo-compatible Mr.Steam generators; an iSteamX control requires an iSteamX-compatible unit. Verify your generator's model number against the compatibility list before ordering.
Can I install this control myself?
Most control installations involve low-voltage signal wiring only, which is generally considered DIY-friendly. However, if any line-voltage wiring must be moved or reconnected, a licensed electrician is required. Consult the enclosed installation manual.
What if my new control doesn't pair with the generator?
Follow the commissioning sequence in the manual exactly — it usually involves holding a button on the generator PCB while powering on the control. If pairing fails, confirm the firmware is compatible or contact the manufacturer's technical support.
Shipping & Delivery
Standard parcel shipping — ships within 1–2 business days via UPS or FedEx.
- Tracking number emailed when shipped.
- Estimated transit: 2–5 business days depending on destination.
- Expedited shipping options are available at checkout.
- Orders placed before 5pm ET on business days ship the same or next business day.
Questions about your order? Email info@saunacompanyusa.com or use our contact page.
Warranty & Returns Policy
Manufacturer Warranty: This part is covered by Spa Parts's standard manufacturer warranty against defects in materials and workmanship. Warranty duration and terms vary by part type — refer to the documentation included in the package or contact us for details.
Returns: Parts & accessories are non-returnable once ordered. This policy exists because installed or opened components cannot be resold as new. Please verify compatibility thoroughly before purchasing — we're here to help.
Defective items: If your part arrives damaged or defective, contact us within 48 hours of delivery. We will arrange a replacement at no charge with proof of the defect (photos or video).
For warranty claims, visit our Warranty Claims page.