Bought two separate Swiftech MCP 355's and they were running without any issue for the last 6 months. I have heatsyncs (not swiftechs) that mount directly on the PCB and I have a 120mm fan right under it blowing. I've also ran the pumps at around %60 in speedfan.

Today I turned on the computer and neither pumps are working. I checked the voltage at the fan headers and the molex connectors and they are all reading 12v. I checked the resistance on the pump connector and they both read ~14kOhms which is what they read when I first installed them (checked to help future troubleshooting).

I'm a bit baffled and really don't know where to go from here without tearing down the loop and opening the pumps.