If your 1-800 Contacts order code is not working, try the following:
Remove unnecessary characters or spaces in between the letters in the order code.
You must adhere to the terms and conditions of the order code.
Check whether the code is valid or not as expired codes are deemed invalid.
Check whether the items are eligible for the order code. If not, add items accordingly to your order, in case you want to redeem the order code.
Check whether your order needs to qualify for any minimum order value to be eligible for the order code.