Why is door opening so fast with boolean condition?

I have the following script that I have modified to allow a door to open upon clicking and then for a button to enter that room to show seconds later. The whole thing works, but for some reason the door opens much faster now that I added in a boolean condition to the DoorOpening function. Why would this change speed of the door?

 // Smoothly open a door
     public float doorOpenAngle = 90.0f; //Set either positive or negative number to open the door inwards or outwards
     public float openSpeed = 2.0f; //Increasing this value will make the door open faster
 
     bool open = false;
     bool enter = false;
 
     float defaultRotationAngle;
     float currentRotationAngle;
     float openTime = 0;
 
     public float waitTime = 2;
     public GameObject doorButton;
 
     bool endNow = false;
 
     void Start()
     {
         defaultRotationAngle = transform.localEulerAngles.y;
         currentRotationAngle = transform.localEulerAngles.y;
         enter = true;
 
         doorButton.gameObject.SetActive(false);
     }
 
     // Main function
     void Update()
     {
        
 
  if (openTime < 1)
         {
             openTime += Time.deltaTime * openSpeed;
         }
         transform.localEulerAngles = new Vector3(transform.localEulerAngles.x, Mathf.LerpAngle(currentRotationAngle, defaultRotationAngle + (open ? doorOpenAngle : 0), openTime), transform.localEulerAngles.z);
 
 
 
     }
 
 
     public void DoorOpening()
     {
         if (endNow == false)
         {
 
             endNow = true;
 
             if (openTime < 1)
             {
                 openTime += Time.deltaTime * openSpeed;
             }
             transform.localEulerAngles = new Vector3(transform.localEulerAngles.x, Mathf.LerpAngle(currentRotationAngle, defaultRotationAngle + (open ? doorOpenAngle : 0), openTime), transform.localEulerAngles.z);
 
             open = !open;
             currentRotationAngle = transform.localEulerAngles.z;
             openTime = 0;
         }
     }
 
     private void OnMouseDown()
     {
         DoorOpening();
         StartCoroutine(WaitForButton());
     }
 
     IEnumerator WaitForButton()
     {
         yield return new WaitForSeconds(waitTime);
         doorButton.gameObject.SetActive(true);
 
     }

Why would this door open so quickly, even when I drastically reduce the openSpeed to 0.25 even?