Thermador PH36GS
Start with the number 27: this box hood is 27 inches deep, so it reaches well over the front of a 36-inch cooktop. Thermador asks for 36 inches of clearance above the cooking surface, which puts the PH36GS at the taller end of mounting heights and makes its draw depend a great deal on a clean, straight duct.
It has no damper and no filter reminder. Cold air coming back down the duct is therefore a real possibility in winter, and the baffles will not tell you when they are full. We look at the roof or wall cap for a flap that works, then the baffles, then the push-button panel.
Thermador lists PH36GWS as the manufacturer successor. The push-button layout is simple, so most control calls come down to a worn switch or a loose ribbon connector. Boost is a separate speed on this model, which is worth testing on its own.
This model has no damper, so air can travel back down the duct. A working cap or flap at the outside end is the usual fix, and we check it during the visit.
A worn push-button contact or a loose connection behind the panel is likely. We test each speed at the blower to see whether the switch or the motor is not responding.
It is a higher output setting for heavy cooking. If it will not engage, we check the control and then the motor winding before talking about a replacement.
Request a visit online in about a minute or phone our coordinators. Close-in neighborhoods often see a same-day slot; the outer counties usually get the next day across Houston.