Espar / Eberspaecher Hydronic D5 Service Kit (B)

Complete Service Kit for the Hydronic D5 Coolant Heater

Keep your 1st generation Espar Hydronic D5 running at peak performance with this comprehensive service kit. Designed to OEM specifications, this kit includes all the wear components needed for a thorough scheduled maintenance service — so you can restore reliable cold-weather heating and extend the life of your heater without the guesswork of sourcing individual parts. This Service Kit (B) contains the Glow Pin, if your Glow Pin is still serviceable, please refer to our Gen 1 Hyd 5 Maint Kit (A) which contains all of the same items minus the glow pin.

What's Included

• Glow pin w/Cable, 25.2106.01.1300
• Fuel metering pump filter, 20.1312.00.0006
• Blower / Burner Seals, 20.1820.99.0001
• Water Pump O-rings (4), 22.1000.70.0009
• Overheat / Temperature Sensor O-rings (2), 22.1000.70.0009
• Atomizing Screen w/O-rings, 25.2121.99.0113

Note: Verify your heater's part number before ordering to confirm compatibility.

Compatible With

• Espar / Eberspaecher 1st generation Hydronic D5 coolant heaters
• Marine, RV, automotive, and light industrial applications

Why Service on Schedule?

The Hydronic D5 is engineered for demanding cold-weather environments. Regular servicing with OEM-grade components prevents hard-start faults, combustion errors, and premature component failure — keeping your heating system dependable when temperatures drop.

Vendor: Espar / Eberspaecher  |  Fitment: 1st Generation Hydronic D5