🔥 02-5838 HYDROTHERM 8" VENT DAMPER – REPLACES 02-5855

Includes Field Controls GVD-8 • 24VAC • 60" Cable

The Hydrotherm 02-5838 is a high-quality 8-inch automatic vent damper designed to improve efficiency and ensure safe operation on compatible gas-fired boilers and heating systems. This model is the direct replacement for 02-5855 and includes the dependable Field Controls GVD-8 damper assembly.

⭐ Key Features

• 🔧 Direct Replacement for Hydrotherm part 02-5855

• 📏 8-inch damper with 60-inch cable

• 🔌 24VAC operation — works with standard heating controls

• 🔄 Designed for intermittent or standing pilot systems

• 🛡️ Built-in safety switch prevents burner operation unless fully open

• 🥇 Stainless steel components for long service life

• 🔥 Automatically reduces standby heat loss for improved efficiency

📊 Tech Specs

💡 Benefits

• 🚀 Performance:
  Works with all 24 VAC, 60 Hz intermittent or standing pilot systems, improving system efficiency by reducing flue heat loss.

• 💲 Less Costly:
  Built with stainless steel for superior corrosion resistance and increased service life.

• 🔐 Safe:
  Integrated safety end-switch ensures the burner fires only when the damper is fully open, protecting the system and improving safety.

🔧 Typical Symptoms of a Failing Vent Damper

If your current damper is failing, you may notice:

• ❌ Boiler will not fire even though there is a call for heat

• ❌ Damper stuck in open or closed position

• ❌ Flashing or fault/error related to damper position

• ❌ Burner cycles but will not ignite

• ❌ Cable frayed or damaged

• ❌ Slow or noisy damper movement

• ❌ Increased fuel usage from heat escaping the vent

❓ FAQ

Q: Is this a direct replacement for Hydrotherm 02-5855?
Yes — this is the correct updated replacement.

Q: Does this include the Field Controls GVD-8 damper?
Yes, the complete GVD-8 assembly is included.

Q: What ignition systems will this work with?
Any 24VAC intermittent or standing pilot system.

Q: Is the safety switch included?
Yes, the built-in safety switch ensures safe operation.

Q: Can I use this on non-Hydrotherm units?
Yes — as long as the appliance uses an 8-inch vent damper and 24V control, it is widely compatible.

🛒 Shopping Tips

✔ Measure your vent size — this is an 8-inch damper
✔ Confirm your system uses 24VAC
✔ Make sure you have at least 60 inches of cable reach
✔ Replace the damper if the system locks out or isn’t firing
✔ Stainless-steel construction makes this a long-lasting upgrade