MODEL 345MAV DIAGNOSTIC CHART
(See Fig. 2.)
FAULT |
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CODE | FAULT CODE DESCRIPTION | CHECKLIST | |
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13 or 33 | Limit Switch Lockout | Check for dirty air filter. | |
Check for blocked | |||
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| Check to be sure manual shutoff valve in gas supply pipe is in the open position. (Follow | |
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14 or 34 | Ignition Lockout or | NOTE: Turn off the electrical supply and remove access doors before continuing with this | |
Ignition Proving Fault | checklist. | ||
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| Check to be sure control switch or knob on gas valve is in ON position. (Follow | |
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| procedures if you must reset switch or knob to ON position.) | |
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24 | Furnace Fuse Open | Check for blown fuse and possible short in | |
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| Check to make sure that all PVC pipes leading into the | |
31 | Pressure Switch Not Closed | exhaust are free from any cracks and sags. Also check the | |
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| the furnace and vent/exhaust pipe on the outside of your home for blockage. | |
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12, 21, 22, | Any Other Fault Code | Call dealer for service. | |
or 23 | |||
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No Fault | Furnace Fails to Operate and No | Check thermostat for proper temperature setting. | |
Code | Check for blown fuses and circuit breakers. | ||
Fault is Signaled | |||
Signaled | Check to be sure blower access panel is properly in place. | ||
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NOTES:
1.Light on continuously means control has power and working properly.
2.The fault code is a 2 digit number. The first digit is determined by the number of short flashes of the light and the second digit is determined by number of long flashes of the light.
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