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After a long period of use, range hoods will have some faults, some of which do not affect normal use, while others cannot be used. Today, I will tell you about the common faults of range hoods and the corresponding maintenance methods.

Maintenance of common faults of range hoods

Common fault 1: insensitive touch switch

Root cause solution: replace the glass plate of power switch.

Common fault 2: the actual effect of cooking fume extraction is poor

The root cause and solution:

(1) The installation point is too high from the cooker, so the installation height should be reduced appropriately;

(2) If the sealing strip fails and leaks, remove and replace the sealing strip to ensure tight sealing;

(3) The internal circulating activated carbon is invalid, so replace it;

(4) If the exhaust pipe is too long or the exhaust azimuth is not well selected, reduce the exhaust pipe moderately and select the exhaust azimuth again;

(5) The working voltage is too low, and a regulated power supply must be provided when necessary; The air inlet channel is blocked by oil stains, so clean the oil stains;

(6) If the outdoor pressure difference is too large, properly open the doors and windows to reduce the outdoor pressure difference.

Common fault 3: the key switch is not working

The root cause and solution:

(1) If the key switch can be locked by pressing it, and the motor cannot be started by pressing it in all gears, the public * * * connection is broken, so find out and weld it again;

(2) When the motor is pressed, if the other gear is normal, it indicates that the connection is gradually broken or only the faulty contact is damaged, then the contact and connection should be repaired;

(3) If the electric function of the key switch is operated, the key is that the elastic yellow deformation of the conduction in the power switch cannot contact the conductive sheet, or the spring sheet of the power switch deviates or falls off, the spring sheet should be adjusted or the power switch should be replaced.

(4) If the power switch of the piano key is pressed and held down, both gears are locked, indicating that the self-locking interlock spring is deformed due to extrusion, and the self-locking interlock spring should be adjusted and maintained.

Maintenance of common faults of range hood

Common fault 4: It won't start after being plugged in

Root cause and solution:

(1) Short circuit or poor contact of power plug, carefully check the short circuit point or poor contact point and re-weld;

(2) When the volume of the starting capacitor of the motor is reduced or there is a short circuit fault or short circuit, the capacitor with the same specification should be removed and replaced;

(3) loose contact or short circuit of switching power supply. Check whether there is wood or welding on the disconnector. If the contact point is loose, a new product should be replaced.

(4) If the rolling bearing is damaged and the transmission shaft is blocked, the rolling bearing must be removed and replaced;

(5) The speed regulating solenoid is short-circuited or short-circuited, so repair or replace the speed regulating solenoid;

(6) Repair or replace the motor stator winding resistance caused by the short circuit of the electrode connecting wire or the motor stator winding resistance.

Common fault 5: oil leakage

Root causes and solutions:

(1) The device is improper and the elevation angle is lacking, so that it can stick to a certain elevation angle and the sucked oil can naturally flow down the oil cup smoothly;

(2) The sealing strip will be useless after a long time, and the sealing place will be padded with foam rubber strip to compact the parts and seal horizontally;

(3) Or add a filter screen at the exhaust port, and the filter screen has a focusing point, so that the oil drops will not fall under the action of interfacial tension;

(4) There is no regular cleaning, and the oil dirt in the oil cup should be cleaned regularly, and the filter screens and pipelines should be cleaned regularly to prevent smoke and oil dirt from overflowing.

Maintenance of common faults of range hoods

Common faults 6: Abnormal sound or loud noise will occur during operation

Root causes and solutions:

(1) Improper assembly makes the fan blades loose and touches the air guide frame to generate abnormal sound, so reassemble and tighten the fan blade fastening nail correctly.

(2) For the motor assembly problem, correct the gap between the stator and rotor of the motor to make it even, and if there is axial movement, a washer should be added;

(3) The motor bearing is seriously damaged, so the rolling bearing of the same type must be removed;

(4) The deformation of the fan blades is unbalanced, so the fan blades can be effectively adjusted, and the movement and balance of the fan blades can be adjusted;

(5) The construction of air intake pipeline is unscientific. The intake pipe should turn less, and the elbow should be large and round.

Common fault 7: excessive vibration of the range hood

Root causes and solutions:

(1) Firmly fixed or poorly installed, with rubber plate or foam plastic, firmly fixed;

(2) Adjust the axial force of the spindle bearing and blade sleeve again, so that the spindle bearing and blade sleeve can be used;

(3) There are foreign bodies on the blades, and the internal scale is too thick. Remove the foreign bodies and internal dirt on the blades;

(4) If the motor bearing is damaged or the rolling bearing hole is too large, remove and replace the new rolling bearing with the same specification;

(5) If the motor winding is partially short-circuited, remove the winding or motor.

The above is about the common faults of range hoods and the corresponding maintenance methods. I hope this article will help everyone in their daily use.

III. Maintenance secret of gas water heater:

Fault III. The outlet water is not hot

1. Before heating the electric water heater, make sure that the mixing valve is closed, that is, the handle needs to be pressed. This prevents the spray head from spilling on the body or wasting after opening the water inlet valve.

Doernte Gas Stove Maintenance Center-National Unified Customer Service Center