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9) REPLACE THE HEAT EXCHANGER COMPONENTS
a. Remove and inspect the new heat exchanger making sure it is designed for the correct model
and is not damaged at all.
b. Place the HX on a surface upside‐down on the vent collar, as shown below. Swap the following
items:
i. Over heat cutoff fuse (OHCF)
ii. Two heating elements
iii. High limit switch
iv. Thermistor (Do not forget red o‐ring)
v. Pressure port (bottom of combustion chamber)
vi. Exhaust plate
Figure 40
OHCF wire clips
Two heating elements
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Troubleshooting Guide
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