2-19. HIGH LIMIT (Continued)
Step 6
Step 7
Step 8
Units with a small diameter hole, in the high limit box, must follow the preceding steps to access the wires and mounting nuts of the high limit. Units with a large diameter hole can access the wires and mounting nuts from the hole in the front of the box.
5.Remove the fan assembly from the interior of the unit.
6.Using a 7/16” socket, remove the nuts securing the blower and pull the blower from the studs.
7.Using a 3/8” socket, remove the nut securing the probe bracket, and pull the bracket from the stud.
8.Cut insulation to access the top, right stud of the blower.
9.Pull the box from the unit to access the high limit.
10.Pull the wires from the high limit, and take a continuity check across the terminals. If it shows continuity, the high limit is good. If the high limit shows no continuity and the temperature is below 300ºF, proceed with the following steps.
11.Using a 5/16” socket, remove the two nuts securing the high limit and remove the high limit.
12.Replace with a new high limit and replace the wires.
13.Replace the box, blower and blower nuts, insulation, insulation washer, probe bracket and nut, and side panel.
14.Unit is now ready for use.
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