No. If you owe tax then the child tax credit will first be used to pay toward the tax due. That is what happens with credits---they are used to pay your tax liability first, then if there is any left over you get it as a refundable credit. Your refund will be shown on line 35a of your Form 1040, or if you still owe something to the IRS it will be on line 37 instead.
PREVIEW 1040
https://ttlc.intuit.com/questions/1901539-how-do-i-preview-my-turbotax-online-return-before-filing
Click on Tax Tools on the left side of the screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.
NOTE: The CTC is indeed a “credit” that can be applied toward any tax liability that you would otherwise have to pay as “tax due” to the IRS.