Date: 202006
Local time of day: 0601-1200
Location: ZZZ.Airport, US
Aircraft: Commercial Fixed Wing
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Parked
Reporter organization: Air Carrier
Reporter function: Captain
Reporter qualification: Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Human factors: Distraction; Other / Unknown
Anomaly: Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Flight Crew
When detected: Other Post Flight
Result: General None Reported / Taken
Contributing factors: Company Policy; Procedure; Human Factors; Environment - Non Weather Related
Primary problem: Human Factors

Narrative: During flight preparation on the ground in ZZZ for a flight to ZZZ1; forgot to switch ON three of the four window heat switches. Reason being...the ON indication typically indicate 'OFF' when the window temp exceeds a certain temperature threshold while sitting on the ground on a hot day in the sunlight. It would not be unusual for me to leave those switches off until we get to the before start checklist and turn them back on knowing full well that once we push and; hopefully; get out of the direct sunlight; they will cool down and we get the proper 'Green' indication. Somehow I missed turning them back on even though I typically touch the switch when the checklist item is read. The left most switch that I touched was the only one that was in the ON position. I never told my FO that I had left them off momentarily for that reason due to other distractions in preparing to depart. Needless to say it was a shock for me when performing my shutdown flow at the gate in ZZZ1 and seeing 3 of the 4 switches already off. I intended to debrief the FO of the issue at the gate; but we had numerous distractions that I could not get to that point and subsequently encouraged him to go ahead and leave as I had some other write ups for maintenance to deal with.The other distractions:1) I was tired and this would be my Xth day of flying in a row after not having flown an airplane in over a month. I slept 'Okay' that night before but not to a degree I would have liked.2) After rotation during the ZZZ departure; we noticed the Antiskid Inop indicator illuminated for about 5 seconds during the after takeoff flow but subsequently and quickly disappeared. When we landed the speed brake did not auto deploy; although the landing was very gentle; I couldn't be sure if it was the touchdown or indeed the antiskid system failed. I had to manually deploy the speed brake and use gentle braking with taxiing off the runway as a precaution although braking felt normal. We did not use autobraking for the landing. I was busy running through my head that this needed to be written up.3) We were assigned an unusual gate at ZZZ1.4) Checklists and debrief were interrupted multiple times as the ground power establishment was inadequate and would fail multiple times after several tries and at one point all power was momentarily lost on the aircraft.5) Multiple write ups for maintenance which took a while before I could leave the aircraft. This is something I had done in the past a few times; holding off turning the window heat switch on and I always had some sort of reminder including the checklist to catch it before push. I think a combo of building fatigue and distractions had a hand in the matter. At the end of the day though; I owned this one. I never informed my FO of what my plan was. On a positive note; except for passing through a thin cloud layer descending into ZZZ1; we never encountered any real icing conditions. None. This is an easy fix. Just turn the darn switches on and leave them on as we should. The windows will cool down as the aircraft moves out of the direct sunlight and airflow begins outside the gate. Let your FO know; like I usually do what you are doing. I think lack of quality sleep; low flight time and building fatigue definitely played a roll. This can work against you when you employ 'technique' under certain circumstances. Again it was my misjudgment and I own this. Thank you.




Synopsis: Air carrier Captain reported forgetting to turn on three of the four window heat switches during pre-flight.