Simple Edit check to email out person not working - if-statement

Question

When someone puts a Y in a cell on a sheet it emails someone.
I am getting it no matter what I enter for the check: Y, F, T, bob - it ALWAYS emails out regardless of the value. It's like the IF is just setting whatever I am asking it to check to the value and doing it. Never seen this in the years of programming..
Can anyone see see something I am missing? I am using an edit trigger
function Checkchange() {
var POs=SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(11, 2).getValue();
var rec=SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(31, 2).getValue();
var backorder=SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(37,5).getValue();
var buyer=SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(38,2).getValue();
var QA=SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(41,5).getValue();
SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(58, 3).setValue(POs)
SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(60, 3).setValue(rec)
SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(61, 3).setValue(backorder)
SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(62, 3).setValue(buyer)
SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(63, 3).setValue(QA)
sendEmailsRec();
}
function sendEmailsRec() {
var EMAIL_SENT = 'EMAIL_SENT';
var QAemailAddress = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(60, 1).getValue();
var POs = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(11, 2).getValue();
var message = "Ready for receiving for PO " + POs;
var QAcheckbox = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(31,2).getValue()
var subject = "Ready for receiving for PO" + POs;
var check = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(60, 4).getValue() + QAcheckbox
// if(QAcheckbox ="Y",MailApp.sendEmail(QAemailAddress, subject, message));
if(QAcheckbox ==="hdjkheehehie",
SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(60, 3).setValue(EMAIL_SENT)+
SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(65, 3).setValue(QAemailAddress + subject + message)+
SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(60, 4).setValue(check));
}

Answer 1

Your condition has a wrong logical operator. One = will always return true. Use == or === instead:
if (QAcheckbox == "Y"){
MailApp.sendEmail(QAemailAddress, subject, message));// Always triggers regradless of value
SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange(63, 3).setValue(EMAIL_SENT));
}
You can read more about operators here.