Lennox Heat Pump Error Code DS2 Simultaneous SLOW Flash / DS1 Simultaneous SLOW Flash

This LED pattern on a Lennox heat pump indicates normal operation. Both the DS1 and DS2 indicator lights flashing slowly at the same time is the control board confirming that the system is either running a conditioning cycle or sitting in standby mode. There is no fault condition associated with this pattern and no repair action is needed.

Yes, it is completely safe. This simultaneous slow flash is a confirmation of normal, healthy system operation. The control board uses this pattern to indicate there are no detected faults and the system is functioning as designed.

A reset is not needed and would not change the underlying status since this pattern represents normal operation rather than a stored fault. After any reset, the control board will simply return to this same slow flash pattern once it powers back up and confirms no fault conditions are present.

No repair is necessary. This pattern is a normal status indication from the control board. If your system is running but not providing adequate heating or cooling, you should check thermostat settings, air filter condition, and airflow, but the flash pattern itself does not point to a component failure.

There is no cost associated with this condition because it is not a fault. If you called a technician specifically to investigate this LED pattern, you would only be responsible for a standard diagnostic or service call fee, which typically ranges from $75 to $150 depending on your region and provider.