All installations and services must be performed by qualified service personnel.
Yes
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| No |
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| No |
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Does system run until |
| Has the high limit thermostat |
| Check all wiring for | |||||
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| or auxiliary high limit |
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thermostat is satisfied? |
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| loose connections. | |||
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| thermostat activated? |
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| Yes |
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| Check for reduced airflow through |
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| the furnace. This may be caused |
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| by an excessively restrictive duct |
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Yes |
| system, an inadequate amount of |
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| supply air,especially for furnaces |
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| installed in closets, or extremely |
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| dirty air filters. Also, check and |
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| confirm heat input rate to unit is |
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| within specifications. |
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Does burner shut off | No | Check for short in wire |
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when thermostat is |
| to thermostat. Replace |
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satisfied? |
| thermostat, if necessary. |
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Yes |
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| Check fan timer settings |
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Does the circulating air | No | against those on connection | Yes | |
blower turn off after | diagram. Is fan selector | |||
| Replace fan timer. | |||
thermostat is satisfied |
| switch set on "manual". | ||
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within 4 minutes? |
| Reset if necessary. Does |
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| fan still fail to turn off? |
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Yes |
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Troubleshooting Complete. |
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| 38 |
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