How Guangzhou ice machine maintenance which company is reliable? Can you recommend it? You can check the credit rating. For example, the maintenance company of Longkou Road. The repairman checked some ice cubes in the ice storage room and found that the ice cubes in it were loose, turbid and contained mineral impurities as reflected by the owner and customers. After carefully observing the frozen R-knot and the ice melting operation, the maintenance personnel determined that there was no washing water during the ice melting operation. The maintenance personnel shut down the ice maker, unplug the connector of the flushing solenoid valve from the control panel, and check the coil resistance in the flushing solenoid valve with an ohmmeter. Its resistance value is infinite, indicating that the solenoid valve coil is open.