How to log in WeChat with my linked accounts if I forget my password?

If you’ve forgot your WeChat password but you’ve linked your mobile number, email address or QQ ID to your WeChat, you may troubleshoot the problem following the instructions below:

1- Log in via Mobile number and SMS code

 1) Tap More Options at the bottom of WeChat login page.

 2) Select Log in to Another Account.

 3) In the page of Login via Phone, select the region of the phone number, then enter the correct number.

 4) Tap Next, then tap Log in via SMS verification code in blue.

 5) Tap Send in blue, and you will receive a SMS verification code from WeChat, enter the SMS code and tap Log In.

2- Log in via linked email address and retrieved password 

 1) Tap More Options at the bottom of WeChat login page.

 2) Select Log in to Another Account.

 3) Tap Log in via WeChat ID/Email/QQ ID in blue.

 4) Tap Unable to Log In at the bottom of the page. 

 5) Tap Email linked, enter linked email address then tap Next.

 6) An email will be sent to your linked email address, follow the instructions in the email to reset password.

 7) Login WeChat by the flow: tap More Options at the bottom of login page > Log in to Another Account > Log in via WeChat ID/Email/QQ ID > enter your email address and new WeChat password > Log In

3- Log in via QQ ID and QQ password

 1) Tap More Options at the bottom of WeChat login page.

 2) Select Log in to Another Account.

 3) Tap Log in via WeChat ID/Email/QQ ID in blue.

 4) Enter the previously linked QQ ID and QQ password, then tap Log In.

Note: If you have forgotten your QQ password, you can retrieve your password by visiting aq.qq.com on a computer. 

Source: WeChat Help Center