Forced air heating systems are delicate. They’re designed based on the cubic area of the home, and they push out a given amount of air (measured in tons, no less) depending on the size of the home. The bigger the home, the more air needed, and the bigger the unit installed. Simple.

Zoning systems work by shutting off air to particular parts of the home via dampers installed in the ductwork.

“The two,” Mr. Accent Heating Tech told me, “are not compatible. The gas pack is forcing out enough air for the whole house, but it’s not getting delivered to the whole house, and it’s all not going into the house — some of it is doubling back to the unit, making it think it’s overheating.”

Time to call TSC again.

This time, they poked and prodded even more. And two problems were uncovered. First, one of the dampers was broken. This was when the tech said, “Oh, crap.”

The second problem: the whole control board needed to be replaced.

“No problem,” I thought. This is all still under warranty.

Parts were ordered, and TSC called to set up a time to come back out. “The total cost will be about $480,” the TSC woman explained.

“Total cost?” I asked. “This is still under warranty.”

“Well, that’s the information I have from the owner,” replied Ms. TSC.

“Well, I’d like to talk to the owner,” replied Mr. Getting More And More Irritated.

Larry — the owner — explained to me that the part was still under warranty, but labor wasn’t included.

“Ah, that’s how you’re going to do it,” I said.

“Excuse me?” Larry asked.

“Well, I knew you were going to get money out of me, I just didn’t know how.”

It seemed ridiculous: almost $500 of labor to replace two parts? Granted, the control board looks fairly complicated, but it should be a matter of disconnecting, reconnecting, setting, and testing. And the damper — it slides right in to a pre-cut hole. Attach the control wire and viola.

At a price of $100 an hour, that’s five hours’ work.

I was still feeling frustrated about the whole thing, and I explained to him my concerns about zoning systems in general. “How much would it cost just to pull the whole system out?” I asked.

“I’ll have to get back to you on that,” Larry replied.

“Well, do,” I said.

He never did.

However, TSC called back later to set up a time to come out and do the work, and we’ve yet to receive a bill. And the heating finally works.

So it seems Mr. Total Comfort was right. Too bad he made such a mess in the bargain…