So for info:įan Speed Control is the choice of the strategy for how to determine the correct speed, depending on a temperature measured at a sensor. Oddly, that MIGHT be what is causing problems on SYS_FAN4, although the manual does NOT tell us that that header can be set for pump operation.ĭetails of fan header options can be confusing, and I see some of that here. On either of those headers, IF you leave it set to be a PUMP header, it may NOT give you any options for other choices because it intends only to give full constant power to its pump. On THAT header, look for an option to specify that this is a FAN, and not a pump. If the fan tests good, try connecting it ti SYS_FAN 5 or 6. ![]() If the fan still does not work right on a known-good header, then the fan is faulty. ![]() If the fan works well on one of those, then header 4 is faulty. If that does not solve it, try the fan connected to another header - particularly, connect to header 1, 2 or 3temporarily because we know those are working properly. Also, just disconnect that fan from that header and re-connect a few times in case there is a bad connection. See if there is a loose or broken wire into the hole for that on the fan cable. Fan speed is carried on Pin #3 of the header. So check carefully the connector on the end of that fan's cable. ![]() I note your small photo shows a 4th System Fan Fail Warning which MAY be saying that ti can detect NO speed from that fan on that header. If it does no, there may be something wrong with that header. First, I agree that SYS_FAN4 should giver you exactly the same options as the first three.
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