Gas/Propane Basics
41-600 Series Hot Surface Furnace Mini-Igniters
Robertshaw’s 41-600 Series Norton Hot Surface Mini Igniters are suitable for numerous types of
heating systems. Norton mini-igniters are made of a non-porous, high-strength proprietary material.
The mini-igniter’s three-second heat-up time, in combination with its small size, has been embraced
by gas furnace OEMs.
NOTE: All 41-600 series igniters are 120 VAC.
Uni-Line Factory
Part No. model Housing length Comments
41-602 601TB None Amana #20165702
41-603 601XBM 2.5" York #025-33421-000
41-604 601XBM 4" Armstrong #44744-2
41-605 601XBM + Harness
& Brackets 2.5" York replacement conversion kit #473-20937-001
Figure 3
Microamp Check
White Rodgers Control Co. also offers Silicon Carbide
Igniters in its F767A series. It should be noted that
items in the White Rodgers modules 50E47 series require
a special wiring harness as shown in Figure 4.
When replacing White Rodgers with another module system,
it requires a wiring change using the special adapter
shown in Figure 4, which is included in all the universal
module replacement kits, such as Honeywell S8910U.
One of the most helpful things to understand is that
these igniters can be cross-referenced with one another
in Figure 2 (see page 12). Figure 5 (see page 15)
describes White-Rodgers’ silicon carbide HSIs in more
depth.
There are several upgrade kits offered by the various
manufacturers whose purpose is to convert from a
Silicon Carbide Igniter over to a Silicon Nitride Igniter.
White Rodgers offers the 21D64-2 Nitride Upgrade
Kit. This kit does not need an extra module as the now
obsolete 21D64-1 required. You can use the old module
to change the igniter.
Honeywell supplies the
Q3200U Universal Hot
Surface Igniter Kit, designed
to provide a robust
field service replacement
igniter in gas-fired appliances
with Norton/St Gobain
(Coorstek) 120 VAC silicon
carbide HSIs. The Q3200U
uses a 120-volt silicon
nitride igniter design with
long life and high resistance
to damage or burnout in the
appliance. The kit includes
the specially-designed silicon
nitride igniter and six
different bracket configurations
to adapt the igniter
to the specific appliance application along
with accessory parts to mount and wire the
igniter. Clear instructions and application
templates are provided to simplify selection
of the proper bracket and ease installation of
the replacement.
Robertshaw also offers the 41-400N Series,
which is a collection of Silicon Nitride
Igniters. They are produced by Kyocera and
distributed through Robertshaw.
Also from Kyocera and distributed by Robertshaw
are the 41-801N, 41-802N and the 41-803.
It is very important to note that these three
igniters cannot be used as a flame sensor. A
separate flame rod is required, such as Robertshaw
1751-729 (24" lead) or 1751-749 (72" lead).
This concludes the two-part presentation
on Hot Surface Ignition Troubleshooting. We
will cover Universal Electronic Ignition Gas
Valves in the next article. ICM
Timmie M. McElwain is President of Gas Appliance
Service, which provides training for those servicing gas combustion
equipment. He is a certified instructor and test proctor for the
Propane Gas Association in their CETP program.
Figure 4
Hookup Power/Igniter
Replacing White-Rodgers HSI
• Switches only one leg (the hot leg) of the igniter circuit.
• Adapter cable connects existing plug to S8910U quick connects.
14 ICM/July/August 2020