510-312-166 WEIL McLAIN 24V BOILER TRANSFORMER WITH BALE WIRE
🔥 Product Overview
The Weil McLain 510-312-166 Boiler Transformer is a genuine OEM 24-volt control transformer designed to supply stable low-voltage power to boiler ignition modules, gas valves, and control circuits. This combination transformer includes bale wire mounting for fast, secure installation and is commonly used on Weil McLain CGx, PFG, EGH, VHE, AHE, EG, CG, and HE boiler series.
Providing clean, consistent 24V power is essential for reliable ignition, control board operation, and safety device performance.
⚙️ Key Features
✅ Genuine OEM Weil McLain replacement
✅ 24-volt control transformer for boiler systems
✅ Bale wire mounting for easy installation
✅ Supplies stable power to ignition & control circuits
✅ Restores reliable burner startup and safety control operation
✅ Direct-fit replacement for listed Weil McLain boilers
📊 Specifications
| Specification | Details |
|---|
| Part Number |
510-312-166 |
| Brand |
Weil McLain |
| Equivalent |
White Rodgers S84A-85 |
| Input Voltage |
120 VAC |
| Output Voltage |
24 VAC |
| Power Rating |
40 VA |
| Frequency |
60 Hz |
| Mounting |
Bale wire |
| Application |
Boiler ignition & control circuits |
⚠️ Common Symptoms This Part Fixes
-
No power to gas valve or ignition module
-
Boiler will not ignite
-
Control board dead or unresponsive
-
Blown low-voltage fuse
-
Intermittent burner operation
-
Erratic thermostat response
🛒 Shopping Tips
• Confirm your boiler model before ordering
• Match VA rating — 40VA is required
• Replace transformer if secondary voltage is below 24V
• Always disconnect power before servicing
• Check low-voltage wiring for shorts that may have damaged the transformer
❓ Frequently Asked Questions (FAQ)
What does this transformer do?
It steps down 120V line power to safe 24V control voltage for ignition modules, gas valves, thermostats, and safety controls.
Is this an OEM Weil McLain part?
Yes — this is a genuine OEM replacement.
Is this the same as White Rodgers S84A-85?
Yes — it is an approved equivalent.
Does it include bale wire mounting?
Yes — bale wire is included for secure mounting.
Is professional installation recommended?
Yes — voltage verification and proper wiring should be performed by a licensed technician.
🔎 Compatible Boiler Models
CGx • PFG • EGH • VHE • AHE • EG • CG • HE
