He did not explain the rest, and Natalie did not press. She did not know about the evenings when Marcus had fallen asleep halfway through reading Emma a story, or the careful budget taped inside a kitchen cupboard, or the old sedan that sometimes required him to wake an hour early to make sure it would start. He had learned that people who asked why he cleaned offices often expected a simple tale of wasted potential. His answer was never simple enough for them.
Luis returned carrying a sealed replacement part, his hair damp from the humidity in the loading corridor. Gerald checked its part number and supervised the procedure while the technicians isolated the equipment and replaced the faulty component. Marcus stood clear of the cabinet, watching rather than reaching for tools. When the safe reassembly and inspection were complete, Luis restored the system through the normal startup sequence.
The green lights came on. The fan began to turn, and the relay engaged without dropping. Ten seconds passed, then twenty, while everyone watched the same display that had frustrated them for hours.
The suspect channel began moving toward the room's measured temperature. Luis checked it twice, compared it with the reference value, and looked up. "They're within tolerance," he said. Peter waited through another full cycle before he allowed himself to smile. "The fan is holding. No protective shutdown."
Natalie exhaled, not dramatically but as though she had been holding a breath for most of the night. "Can we use the room tomorrow?" Gerald raised a hand. "After we complete the remaining verification and monitor it through the morning, I'll give you a definite answer." She nodded. "That's what I needed to hear."
Peter turned toward Marcus. "You were right about the sensor." Marcus shook his head slightly.
"We were right once you tested it. I only heard the click." Peter looked at him for another second and then offered his hand. Marcus accepted it with the careful grip of someone whose hands were still a little rough from years of practical work.
By 12:56, the equipment was running normally and the room had started cooling to its steady operating condition. Marcus picked up his cleaning cloth and wiped the conference table while Luis and Peter completed their documentation. The job had been interrupted for more than an hour, and there were still offices on his route that would be occupied again in the morning. He returned to the door and took the handle of his cart.
"You're leaving?" Natalie asked. Marcus looked back. "I still have a job to finish." She gestured toward the cabinet. "You just helped us find a problem that kept three trained people here for most of the evening."
"And they've still got to finish proving it's fixed," he said. "Somebody has to clean the offices before those folks get here." Peter laughed quietly, though this time there was warmth in it. "Most people would be asking for a raise about now."