The Rheem phone number for customer service is 1-800-621-5622.
You can call Rheem customer support for general information and help.
There are Rheem customer service numbers for different inquiries. To call their division office regarding questions about sales and marketing, use 1-334-260-1500. If you have any troubles with their tankless water heater, call Rheem tech support at 1-866-720-2076 anytime. You can call 1-805-278-5300 for information about pool and spa parts. If you need a furnace, heat pump, or home generator parts, you can learn about their availability and prices at 1-479-648-6237.
In case you need to reach the headquarters, dial 1-479-646-4311. The Rheem contact that deals with HVAC warranty is 1-479-648-4900.