What is the minimum order quantity (MOQ)?

MOQ starts from 50 - 100 pieces for most drain pumps, magnetrons and motor parts, and from 200 pieces for control boards and sensors. Mixed-model trial orders are accepted to help you test the market before scaling.

How long is the lead time?

Stock items ship in 3 - 7 days after payment confirmation. Made-to-order batches take 15 - 25 days depending on quantity and packaging requirements. Peak season (Aug - Oct) may add 5 - 7 days.

Do you support OEM packaging and labeling?

Yes. We provide neutral packaging, custom color boxes, your logo printing and barcode labeling. OEM packaging usually requires 500 - 1,000 pieces per model and 5 - 7 extra days for printing.

What warranty do you offer on spare parts?

Standard warranty is 12 months from shipment date for motors, magnetrons and control boards, and 6 months for consumable items such as carbon brushes and filters. Defective rate above the agreed threshold is replaced or credited in the next order.

Which shipping methods do you handle?

Express (DHL/FedEx/UPS) for samples and small parcels, air freight for urgent 50 - 300 kg orders, and sea LCL or FCL for wholesale volumes. We support FOB Shenzhen, FOB Ningbo and CIF terms, and can consolidate multiple categories into one container.

What are your payment terms?

T/T with 30% deposit and 70% balance before shipment is standard. PayPal and Western Union are accepted for sample orders. For repeat buyers we can discuss O/A terms after several successful shipments.

Can you match parts by OE number or photo?

Yes. Send the OE number, the nameplate photo of the appliance, or a photo of the old part with dimensions to sales88@ggatc.com or WhatsApp +86 181 5864 9251. Our team replies with matched models, price and availability within 24 hours.

Do you provide samples?

Samples are available. Sample cost is refundable against a bulk order above the agreed quantity. Buyer pays courier freight, or we add it to the sample invoice.

What documents can you provide for customs clearance?

Commercial invoice, packing list, bill of lading, certificate of origin (Form A / Form E where applicable) and CE or RoHS declarations for eligible items. Tell us your import requirements when confirming the order.

Troubleshooting

Troubleshooting Guide: Washing Machine Drain Pump and Microwave Magnetron Failures

Q: Are these original brand parts?

No. All items are compatible aftermarket replacement parts. Brand names such as Midea, Gree, Haier, Little Swan, LG, Samsung, Whirlpool and Panasonic are used only to describe fitment. All trademarks belong to their respective owners.

Symptom to cause to replacement part tables for the two most common white goods failures, with multimeter test values and average repair time for service centers.

2026-08-05 · 8 min read · GGATC Technical Team

Troubleshooting Guide: Washing Machine Drain Pump and Microwave Magnetron Failures

Drain pumps and magnetrons account for a large share of white goods service calls because both are wear parts exposed to water, heat and electrical stress. This guide maps observable symptoms to root causes and the correct replacement part.

Washing Machine Drain Pump Faults

Symptom	Likely Cause	Test Method	Replacement Part
Water remains in tub after spin	Impeller blocked or worn	Remove pump, rotate impeller by hand	Drain pump or impeller assembly
Pump hums but does not move water	Open winding or seized shaft	Measure coil resistance, expect 150 - 220 ohm	Drain pump
Error code OE / E2 / 5E	Pump circuit or pressure sensor fault	Check 220V at pump connector during drain	Drain pump, water level sensor
Loud grinding noise when draining	Bearing wear or foreign object	Inspect volute for coins and lint	Drain pump
Pump runs continuously	Control board relay stuck	Disconnect pump, test relay output	Main control board

Multimeter Reference Values

Coil resistance of a 30W pump: 150 - 220 ohm at 20 degreeC.
Insulation resistance to housing: above 2 megaohm on a 500V tester.
Supply voltage during drain cycle: 220 - 240V AC, no more than 5% drop.

Microwave Magnetron Faults

Symptom	Likely Cause	Test Method	Replacement Part
Runs but does not heat	Magnetron filament open	Measure filament, expect below 1 ohm	Magnetron
Heating is weak	Magnetron aged, HV capacitor weak	Compare heating time against rated output	Magnetron, HV capacitor
HV fuse blows repeatedly	Magnetron internal arc or HV diode short	Test diode both directions	Magnetron, diode, fuse kit
Burning smell and sparking inside cavity	Waveguide cover carbonised	Visual inspection of mica sheet	Waveguide cover
Turntable stops while heating	Synchronous motor failure	Check 220V at motor terminals	Turntable motor

Safety Note

A microwave HV capacitor can hold a lethal charge after the unit is unplugged. Always discharge the capacitor with an insulated screwdriver across its terminals before touching the magnetron circuit.

Repair Job	Average Labour Time	Parts Cost Range	Typical Service Charge
Drain pump replacement	20 - 35 minutes	$1.9 - $5.3	$25 - $45
Impeller assembly only	25 - 40 minutes	$0.5 - $1.1	$20 - $35
Magnetron replacement	25 - 40 minutes	$4.3 - $8.7	$40 - $70
HV capacitor and diode kit	15 - 25 minutes	$1.0 - $2.2	$25 - $40
Carbon brush pair	20 - 30 minutes	$0.3 - $0.8	$20 - $35

Conclusion: most drain pump and magnetron faults can be diagnosed with a multimeter in under 15 minutes, and parts cost is low enough that replacement beats repair in almost every case. Stocking a universal pump, a 2M214 magnetron, an HV kit and a carbon brush pack covers the majority of service calls. Request a wholesale price list at sales88@ggatc.com or WhatsApp +86 181 5864 9251.