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Hi, This is in a Pentair Mastertemp 400. I've been running some tests as recommended by some of you folks, but I think my thread is old enough that it got buried in the forum. Basically I'm wondering if the results I got indicate a short to ground in one of the windings, and if that means...

Ok, I got some readings for the wire harness coming from the blower: Y W: 11.6 Ohm Y BK: 11.6 W BK: 0.1 All other combos were open, including R/Bl and G/W C1 Bk: 11.6 C1 Y: 0 C1 W: 11.6 C1 C2: open C2 Bk: open C2 Y: open C2 W: open Across new capacitor: open Also checked all values with...

Can you clarify how to test the windings? I made some more progress. I swapped out the capacitor; it's larger than the old one, but it's the same uF and voltage rating (8uF, 250V, 50/60Hz). No joy with the new capacitor. However, I did test the voltage to the two wires when I powered on the...

I don’t understand how to check the capacitor windings, bc I only have the red and black wire. I’m replacing it just in case since it’s cheap, but what am I missing here?

I'll take one tomorrow when the sun is up if I can. But basically, the relay clicks, it starts to move for a split second and then stops, after which I get the AFS light. There is nothing impeding its movement, it moves freely by hand (bearing feels good to go).

I was able to confirm that F2 gets 120V when the heater starts up. Also the AFS still works based on open when static and fully closed when I lightly blew into it. Testing TH to the GND terminal 3 to the right of it I got, oddly, 2.4V whenever the heater had power (just circuit breaker on)...

Can anyone please help with the capacitor removal question?

First of all, thank you all for the detailed responses. How do I remove the capacitor? The cover doesn't have any screws (besides the grounding screw), and those four metal clips are holding it on. I haven't tested a capacitor before...I do know how to use a multimeter but I'm not an...

Hi, new here, and trying to avoid replacing my entire heater. I have a Pentair Mastertemp 400 (somewhere between 7 and 14 years old; I can't find the paperwork from the previous owner) that stopped heating b/c of an AFS light. I verified that the airflow sensor still works by blowing into the...