Return & Refund Policy

At Sunster, your satisfaction is our priority. If you’re not happy with your purchase, please contact us within 30 days of delivery to initiate a return or exchange.
✅How to Start a Return
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Contact Us: Email our support team at cs@sunster.tech with your order number and photos/videos of the item.Our team will assess your request and respond within two business days.
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Wait for Approval: Do not send items back without our confirmation. Once approved, we will provide you with the correct return address and instructions.
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Ship It Back: Send the item using a trackable shipping service. We recommend using a shipping method with signature confirmation, as we cannot be held responsible for lost return packages.
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Refund
Once we receive your return, we will inspect it within 3–5 business days.
Non-returnable items:
- Items damaged or lost due to customer mishandling.
↩️ Shipping Costs:
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Defective/Wrong Item:We pay.
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Changed Mind/Wrong Size:You pay
💰 Refunds
- Issued to your original payment method within 2-3 business days after we receive the item.
🕒Order Cancellations
- Orders can be canceled before the item ships. Contact us immediately if you wish to cancel. Full refunds will be issued for unshipped orders.
- Orders cannot be canceled once the parcel has been shipped.
📧Contact Sunster
- Customer Support: cs@sunster.tech
- Business Cooperation: sunster@sunster.tech
📧Operating Hours (Hong Kong Time):
- Email Support: 9:00 AM – 6:00 PM (Monday to Friday)
- We aim to respond to all inquiries within 48 business hours.
Click Product Manual to know more details
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Smart APP & Remote Control Integrated AC
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Bluetooth Rooftop Control Panel
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Split-type Air Conditioner
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Integrated AC
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S-A2409PW WiFi Switch
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S-A2446 GSM LTE-4/5G Switch
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HTB1 Diesel Heater
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TB10 Diesel Heater Pink
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TB10 Diesel Heater
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TB10 Diesel Heater Black
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A2422 Wireless Temperature Remote Control - Available After August 2025
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A2422 CO Alarm Control
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TB30 Diesel Heater
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A2200BS Diesel Heater
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A2200BS Diesel Heater
All in one Vesion
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A2302BL Diesel Heater
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A2302S Diesel Heater
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A2302BHP Diesel Heater
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A2302BP Diesel Heater
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A2209 Diesel Heater
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A2013SL Diesel Heater
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A2013SL Diesel Heater
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A2013ST Diesel Heater
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A2013ST Diesel Heater
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A2301 Water Heater
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A2200BH Diesel Heater
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A2105BL Diesel Heater
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A2302B Diesel Heater
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A2105L Diesel Heater
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A2105BL Diesel Heater
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A2209V Diesel Heater
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A2309 Diesel Heater
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A2309H Diesel Heater
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A2018 Diesel Heater
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A2019S Diesel Heater
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A2019V Diesel Heater
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A2018S Diesel Heater
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A2018G Diesel Heater
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A2018GL Diesel Heater
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A2018GH Diesel Heater
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A2018H Diesel Heater
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A2018GT Diesel Heater
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A2174 Diesel Heater
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A2173 Diesel Heater
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A2172 Diesel Heater
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A2171S Disel Heater
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A2171 Diesel Heater
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A2017 Diesel Heater
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A2170 Diesel Heater
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A2013 Diesel Heater
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WTD1 Water Heater
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WTD2 Water Heater