Solenoid; Testing Solenoid - Central Boiler Classic CL 4030 Owner's Manual

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CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
3. Replace the bulb.
4. Ensure that the gasket is aligned correctly; then install the plastic cover
and secure with two screws.

SOLENOID

Before replacing the solenoid, check the following items:
• Check to be sure there is incoming power to the furnace.
• Check inside the control panel to see if the fuse has blown. If the fuse
is blown, check the draft opening to be sure the linkage operates freely
and that there are no obstructions to the door; then replace the fuse.
• To test the solenoid with a multimeter, turn the Power Disconnect
Switch to the OFF position and refer to Testing Solenoid.
• If solenoid still does not operate, turn the Power Disconnect Switch to
the OFF position and replace the solenoid (see Replacing Solenoid).

TESTING SOLENOID

Do not attempt service on the solenoid without first disconnecting the electrical power
at the main power source.
1. Remove the screws securing the draft enclosure cover; then remove the
cover.
Solenoid may be hot.
2. Carefully disconnect the two wire leads connected to the left side of the
solenoid by gently pulling and moving them from side to side.
3. Using a multimeter set to Ohms, test the solenoid's resistance by touching
the meter leads to the solenoid terminals.
4. If the multimeter reading is between 15 and 30 Ohms, the solenoid is
good. If the multimeter reading is less than 15 Ohms or more the 30
Ohms, the solenoid is faulty and should be replaced.
5. If the solenoid is good, carefully attach the wire leads onto the solenoid
terminals (white wire connected to the upper terminal).
6. Install the cover and secure with the screws.
7. Turn the Power Disconnect Switch to the ON position.
CAUTION