My wife and I recently took two of our grandkids to Disneyland for the parks and stayed at the Grand Californian for 4 nights. We have been taking our grandkids two at a time when they are 8-10 years of age to share the "magic" of Disney We had a great experience visiting the parks and enjoying the convenience of the hotel's location. The reason for my negative review occurred on the last day of our stay. Early in the morning my wife and I and grandkids were awakened to a hot room with the smoke detector emitting a piercing alarm. I did not observe any smoke but opened the doors to improve ventilation. The HVAC vent was blowing hot air. I did not hear any other alarms in the vicinity of our room and no one else was in the hall. I returned to the room and my wife was attempting to calm our upset grandkids and I threw a towel over the alarm and called the front desk. I got a message saying they would call back when they were available. With the kids becoming increasingly upset and convinced that there was no real emergency I removed the smoke detector from the wall and disabled it by disconnecting it and removing the battery. In a while a maintenance man arrived, He manually reset the thermostat to "cool" and left to get a new battery for the smoke detector. This all seemed a bit odd but I was grateful for the "fix." With the grandkids now calmed we decided to make the best of our early "wake up" and do another early entry into the park. This was to be our last day and our strategy has always been to make it a big day. We had early morning flights the next morning and have always found "tired kids" seem to travel better. We enjoyed a full day in the parks to maximize our last day. We said farewell to Disneyland late in the evening with the famous Disney fireworks giving us Walt's kiss goodnight. In bed asleep after preparing for our early departure we were once again awakened by the piercing of the smoke detector. Suspecting there was no emergency I called the front desk again only to get another message that they would call back. I repeated the checking of the HVAC and opened the room doors finding that our room seemed to be the only one having issues. Frustrated I removed the alarm from the wall while my wife tried to calm the kids. I took the alarm to the front desk with my frustration building in light of our grandkiids' distress. Finding the front desk attendant on the phone with who I now believe was my wife, I tossed the alarm to him and he caught it. He must have sensed my frustration as I informed him of this being the second time today this had happened. All he could say was that he was prepared to call security. I returned to the room where my wife was still consoling our grandkids. They did not feel safe given all that had occurred . Exhausted we all tried to go to sleep to get rest before our early departure, all the while I suspected someone was going to come to reinstall the smoke detector due to code and liability. In about 30 minutes an entourage of management, security, and maintenance knocked on the door. I stayed in the hall so they could observe that I was no threat while two maintenance replaced the detector. Sleep did not come easy but eventually we fell asleep and were awakened by our gentle phone alarms. I have never written a negative review. I have written a few positive reviews usually recognizing an outstanding staff member. I would like to apologize to the front desk person who I obviously presented as a threat. That has never been my disposition and I'm sorry he was fearful. A full day at Disney and a repeat negative experience brought out "bad grandpa." Maybe we can caulk this up to an isolated event in a 750 room mega hotel serving who knows how many guests that night, but my wife and I decided that when we bring the next pair of grandkids we will probably look at options. They may not even let me back in? I am a bit surprised that we haven't heard from the resort in any fashion. Kent & Regina Johnson