A flashing heater light indicates a missing or broken High Temperature Limit sensor. This sensor is required. The sensor is not polarized and must be connected to pins 1 and 2. Refer to figure 17 in the manual.
Why is my heater light flashing?
by ETI Staff | Aug 2, 2011 | Frequently Asked Questions | 2 comments
Shouldn’t it be pins 10 & 11?
According to the APS series manual (part number 22862 Rev F, page 19), sensor connections are to pin numbers 1, 2 and 3. The unit’s thermistor connection is to pins 10 and 11