When a blower dies mid-event

Your phone rings at 2:15pm. The bounce house is going soft and there are eleven kids at the party.

This is a solvable problem. It is solvable faster if you have thought about it once before today, which is the entire purpose of this post.

The first ninety seconds are not about the blower

Kids off the unit first. A deflating inflatable is a tripping and entrapment hazard, and a partly inflated one with children still in it is worse than a flat one. Get them off, get the adults to hold them off, then look at the equipment.

Say the sentence that buys you the next ten minutes: "Everybody off for a minute, I am going to check the fan." Calm, specific, and it tells the parent you have done this before.

Check in this order

Work outside in. The cheap causes are the common ones.

Is it still running? A blower that is silent and a blower that is running against a blockage are two different problems, and you can hear the difference from the patio.
Power. The breaker or the GFCI. Somebody plugged a snow cone machine, a crock pot, and your blower into the same outdoor circuit. This is the single most common cause and it takes ten seconds to rule out.
The cord. Wrong gauge or too long, and the motor is starving on voltage drop. It will run warm, run weak, and sometimes trip on thermal overload. Two cords daisy-chained together is the classic version.
Thermal cutout. If the housing is hot and the motor is dead, it may have shut itself off. Let it cool and it may come back, which tells you the real problem is airflow or voltage.
The intake. A towel, a tarp corner, a shirt, or grass clippings on the screen. Airflow in is what keeps the unit up.
The tube connection. The clamp or strap slipped and the tube is only half on the inlet. Air is going into the yard.
Deflation zipper or dump flaps. Somebody opened it. Kids find these.
A seam or baffle. If everything upstream is fine and the unit will not hold, air is leaving somewhere it should not. That is a repair, not a field fix.

Most of your 2:15pm calls stop at step two or step three.

Carry the fix

A spare blower on the trailer is not an expense, it is the difference between a swap and a refund. Swap it in, take the dead one home, diagnose it on Monday in your own shop with your own light.

The short list worth carrying every Saturday:

One spare blower
Two heavy-gauge outdoor extension cords, and no adapters that let you cheat a ground
A patch kit and vinyl adhesive for pinholes
Spare stakes, sandbags, and straps
Zip ties, duct tape, and a multi-tool

Then have the customer conversation on purpose

Parents do not remember the failure. They remember what you did about it.

Tell them three things, in this order: what is wrong, what you are doing, and when it will be fixed. "The fan overheated. I have another one on the truck, I am ten minutes out, and they will be back on it by 2:45." Then hit the time you gave.

If it cannot be fixed today, say so immediately and lead with the remedy. Do not negotiate in the driveway with a birthday party watching, and do not invent a refund policy on the spot. Decide the policy now, in writing, while nothing is on fire:

Under an hour of downtime, some fraction refunded
More than that, a bigger fraction
Never inflated at all, the whole thing back

Whatever you pick, put it in your rental agreement and honor it without being asked. A parent who gets an unprompted partial refund on Monday tells other parents about you, and in this business that is the whole marketing budget.

Close the loop Monday, not next season

The failure is not over when the party is. Two things have to happen:

Take the unit or the blower out of service so it cannot get booked next Saturday while it is sitting in your shop. PartyPad tracks quantity in maintenance separately from quantity available, and it keeps a maintenance history and repair cost per item. Move it, log what you did, and the number that shows as bookable is the number that is actually bookable.

Write down the cause. Three cords in one season means you are underspending on cords. Two thermal shutdowns on the same unit means the blower is undersized for it, or the intake placement in that yard is wrong. The pattern is only visible if you record the individual events, and it will save you a Saturday next year.

Kids off. Power, cord, intake, tube. Swap the blower. Give a time and hit it. Log it Monday.

That is a ninety-second problem, handled.

See how a unit moves in and out of service. One click, no card.