Monsoon season is the hardest stretch of the year on HVAC equipment here, and it isn't the rain that does the damage. It's the power cutting out and coming back, the debris, and the humidity arriving while the heat is still on.
Power going out isn't what kills equipment — it's what happens when it comes back. Surges take out capacitors, contactors and control boards, and those are the repairs we run most often after a storm night.
A whole-home or HVAC-specific surge protector is genuinely worth asking about here. A control board is an expensive thing to lose to a storm that lasted twenty minutes.
When the power drops, it's also worth switching the thermostat off until it's back and stable. That prevents the compressor trying to restart into an unstable supply.
Monsoon wind packs the condenser coil with dust, leaves and whatever was loose in the neighbourhood. A blocked coil can't reject heat, so the system runs longer and harder right when you need it most.
Clear debris from around the unit and give the coil a gentle rinse with the power off at the breaker. Keep two feet clear around the whole cabinet — it needs to breathe.
If the unit sat in standing water, don't just switch it back on. Water in the electrical compartment is a real hazard and needs looking at first.
Monsoon humidity means the system is pulling far more water out of the air than usual, and all of it has to go somewhere. Condensate lines that were coping fine in June back up in July.
A blocked condensate line is one of the most common calls of the season. Many systems have a safety switch that shuts the whole thing down when the pan fills, so a house that stops cooling mid-storm-season is often this and nothing worse.
The house also feels warmer at the same thermostat setting when it's humid, which leads people to set it lower and run up the bill rather than address the humidity.
Clear the condensate line, check the drain pan and the safety switch, and have the electrical components tested — a weak capacitor will not survive a surge that a healthy one shrugs off.
Make sure the outdoor unit is on solid, level footing. Ground that softens in heavy rain can shift a pad, and a unit that isn't level doesn't drain or run the way it should.
Surge damage to a capacitor, contactor or board is common and usually a repair, not a replacement. We run 24/7.
