![]() (G and Y terminals are de-energized.)Ĭirculating fan and cooling compressor turn off immediately. (G and Y terminals are energized.)Ĭirculating fan is energized at the cool speed. If heat fan off delay is longer than the recycle delay timing, the heat fan continues to run through the next trial for ignition. If heat fan has started, it continues through the delay off period.īurner motor is de-energized and oil primary control goes into recycle mode. ![]() Oil primary control locks out within lockout timing (timing depends on oil primary control). Oil primary control and circulating fan are off. When timing is complete, the circulat- ing fan is de-energized. ![]() Heat fan off delay (60 to 120 seconds) timing begins. Oil primary control is de-energized, terminating the burner cycle. When timing is complete, the circulating fan is energized at heat speed and warm air is delivered to the controlled space. Oil flows as long as cad cell senses flame.īurner motor is energized and heat fan on delay timing begins. Ignition system and oil primary control start the furnace. Lennox ELO183DH Series Furnace Troubleshooting Action In that case, you will not be able to fix your furnace without professional help. If you cleaned the pilot light but nothing happened, the cause may hide in poor gas flow which is quite a different story. Inspect the pilot light and try to relight it if it’s out by carefully cleaning it.
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