CRLF stands for
CR = carriage return
LF = line feed.
Think of a manual typewriter. The carriage is what holds the sheet of paper. After typing approx 80 characters, you had to sent the carriage back to the left edge of the paper. That is returning the carriage (a CR). The ASCII code for a CR is Chr(13).
The lever (manual typewriter, remember?) that returns the carriage also has to move the paper so the typing won't type over the previous line. That is a line feed (LF). The ASCII code for a LF is Chr(10).
I don't understand why you would want to do this as all of the lines of the CSV file would run together.
You might try
Code:
Cells.Select
Selection.Replace What:=Chr(13), Replacement:=Chr(32), LookAt:=xlPart, _
SearchOrder:=xlByRows, MatchCase:=False, SearchFormat:=False, _
ReplaceFormat:=False, FormulaVersion:=xlReplaceFormula2
You know that the ASCII code for a CR is Chr(13).
Chr(32) is the character code for a space.