If a mattressfirm.com coupon code isn't working, try the following steps:
- Double-check the code for any typos or errors.
- Ensure the code is still valid and hasn't expired.
- Review the terms and conditions to confirm the code applies to the items in your cart.
- Clear your browser's cache and cookies and try applying the code again.
- Try using a different browser or device.
- Contact Mattress Firm customer support for assistance.
If none of these steps work, the code might be invalid or expired.