Pentair pool heater gets Service Heater
3 posts / 0 new
Last post
Posted

The Service Heater light came on. The fault code is AFS. Blower and burner do not fire. Service heater light comes on a few seconds after the power up sequence on the LED panel. Pool service tech came today and the troubleshooting tree didn't find what was wrong so we are looking where to go next. The heater just stopped working (3.5 years, so just out of warranty - yech) so we don't suspect wiring issues. Neither the blower fan nor the burner come on at all nor do they sound like there is any attempt to do so.

The heater is controlled by a Pentair automation controller.

Here's what we did. All are done with the main power and pump running and with spa heat called for (with the Service light on)

1. Voltage checks. 24V from transformer.
2. Even though the path doesn't take us there disconnected F1 and F2 and the blower does turn on.
3. Checked and replaced the Air Flow Switch which didn't fix it. Tubes are not plugged.
4. He tried to swap the control board (the one for the pushbuttons and status display) but the board didn't look identical (he thought it was a newer model) but the board got fried! All the main connectors keyed correctly but there seemed to be a different layout. So it appears that it is not a direct replacement for this model.

What next?

Please Sign In to post comments
Richard's picture
Tech, Pentair
If the blower did not come on
Richard's picture
Tech, Pentair
Posted

If the blower did not come on during F1 and F2 wires were jumped out, there maybe and issue with the blower not functioning, this procedure allows the voltage to bypass the ignition module and allows the blower to run separate. Possible issue with blower.

Please Sign In to post comments
As I stated in the original
Posted

As I stated in the original post, the blower and burner never attempt to start, yet the blower does run when F1 and F2 are connected.

Please Sign In to post comments