I am getting Error EE04 on my HeatSeeker WBR, what does that mean?

Error code EE04 on a HeatSeeker WBR indicates an issue with either high or low refrigerant pressure. This error often occurs when the circulation pump turns off while the heat pump is still running. If this is not the situation, you may need to investigate the flow rate through the heat pump. To reset the error, you'll need to power the unit off and then on again. If the problem persists, there could be a more serious underlying issue with the unit that requires further examination.