At 2:40 on a Tuesday morning my phone went off. A plastics plant outside town — forty injection molding machines, a freezer full of resin, and a 400 kVA standby set that was supposed to carry the whole place. It didn’t. The plant manager met me in the rain with a flashlight and a three-ring binder. Inside the binder: a service contract. “They’re supposed to answer within four hours,” he said. It was hour three. Nobody had called back.
I’ve spent twelve years on both sides of that binder — the tech rolling the truck at 3 a.m., and the engineer telling a customer his contract doesn’t cover what’s broken. Here’s what I know now: the front pages of a service contract are marketing. The exclusions page is the contract. These are the five traps I check before anyone signs.
Every contract promises fast emergency response. Four hours is the magic number. What almost none of them define is when those four hours begin. From your first call? From when a dispatcher assigns a technician? From when the tech leaves the shop — and does the clock even run at night?
I once watched a customer burn six hours arguing about this at 3 a.m. The contract said four-hour emergency response. The dispatcher logged his call at 2:10. A tech was “dispatched” at 5:40. Their position: response means a technician assigned, not a technician on your site. Perfectly legal. Perfectly useless.
Get one sentence in writing: the clock starts at your call, it runs 24/7, and “response” means boots on your site. If they won’t add that sentence, the four hours are decoration.
Flip to the back. That’s where the contract tells the truth. Batteries: excluded. Belts and hoses: excluded. Coolant: excluded. Filters beyond the first change: excluded. The “full-service” agreement suddenly covers labor and not much else.
Here’s the problem. Batteries are the number one reason standby generators fail to start — I wrote a whole piece on that. So read what you actually bought: an agreement that excludes the single part most likely to kill you on the night you need it. A battery dying in year three isn’t a surprise. It’s a schedule. A serious contract either puts batteries on a replacement cycle or says plainly that it doesn’t, and prices the swap visit honestly.
Same story with the small stuff. A forty-dollar fuel filter once killed a forty-thousand-dollar generator — a story I still tell customers. If your contract’s idea of “parts included” stops at gaskets, you don’t have coverage. You have a labor retainer with nice letterhead.
New fuel filters and a starting battery staged for a generator service visit — the consumables many service contracts quietly exclude
A proper preventive visit takes a couple of hours on a mid-size set. Oil and filters. Coolant condition. Belt tension. A battery load test — a real one, not a voltmeter glance. A crank test with the readings written down. A loaded run long enough to get the engine properly hot. Control panel alarm history, reviewed line by line.
What some contracts deliver instead: a tech circles the machine for twenty minutes, ticks twelve boxes, and leaves. The report says “inspected.” Everything was fine. Everything is always fine, right up until it isn’t.
Ask for the report format before you sign. I want numbers on the page. Checkmarks tell me nothing. Oil pressure, coolant temperature, battery voltage under crank — written down, every visit. And ask how long the visit is scheduled for. Half an hour on a 500 kVA set means you’re buying theater. A real maintenance checklist takes longer than a coffee break.
A service technician working through a preventive maintenance checklist on a standby diesel generator — a proper visit records readings, not just checkmarks
Nobody asks this until they need the answer. Your set throws a fault the tech can’t fix on site. The part ships from overseas. Nine days. The contract covers the repair — wonderful. Who powers your building for nine days?
Almost no standard contract promises temporary power. Some dealers will “assist in arranging rental,” which means they’ll hand you a phone number and you’ll get the rental bill. If continuous power is the reason you bought the generator, a contract without a loaner or priority-rental clause has a hole exactly the size of your risk.
To be fair, real temporary-power coverage costs real money. I’m not saying every agreement should include it. I’m saying you should know whether yours does — before the week you find out the hard way.
Page six, paragraph eleven: “This agreement shall automatically renew for successive twelve-month terms unless either party provides written notice at least ninety days prior to expiration.” You signed it eighteen months ago. You don’t remember it. Nobody remembers it.
Then the price jumps fifteen percent and you can’t leave without paying out the term. I’ve seen three-year lock-ins sold as “one year, with renewal.” Same cage, worse lighting.
My rule now: no auto-renewal without a price cap, and a termination clause I can actually use — thirty days’ notice, no penalty, in plain words. If the rep says “oh, we never enforce that,” get it in writing. Unsigned promises evaporate.
After all that, you’d expect me to tell you to skip the contract. I won’t. A good service agreement is worth real money — I’ve watched neglected sets die at year six that should have run twenty. Just sign one written by someone who’s been woken up at 2 a.m.
Here’s what I look for, and the whole thing fits in one paragraph. The contract names your technician — not “a qualified technician,” a name. It lists every preventive visit and the readings the tech will record. It puts batteries on a three-to-four-year replacement schedule. It includes one loaded run a year, long enough to matter — the kind load bank testing people and NFPA 110 both expect on life-safety sets. Its exclusions fit on half a page, in words you understand. And it lets you leave.
The plastics plant? The tech showed up at 6:10. Dead battery, swollen like a football. Forty minutes and a fresh battery later, they were running. The manager framed the invoice and hung it next to the binder. “Next contract,” he said, “I’m reading the back pages first.” Smartest thing anybody said that night. If your agreement is up for renewal, talk to someone who’ll put the readings in writing before you sign.
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