Poorly Fitting Supply Duct
"We were a couple hundred dollars higher on this job," says Mr. Bill. They didn't get the installation project, but the homeowner called them eventually. "She wants us to correct this, because she can't get the other company to come back."
So-Called 'Airflow Control' in Garage
"I was called out on a 'no cool' call," says contractor jjean0407. "This was going to a closed-in carport. The customer had all other registers closed to push more air into this room."
Bad Check Valves
"Brand new check valves on used display cases converted to hot gas would stick after defrost, and the new, low temp rack was taking a slug," writes contractor johndief.
"It would take about three hours after the late-night defrost for enough liquid to get through the orifice to start filling the compressors. The thermal expansion valves were just sitting there watching refrigerant go by and could do nothing about it."
'BOOM' Goes the Suction Line
"I spent two days trying to track this leak down," writes aarron. "I ended up being above two layers of 12-in. insulation, a fire-rated ceiling, another layer of insulation, then a t-bar ceiling. About 16-ft. from the floor.
When I FINALLY find it, the tenant needs to clear the suite for the rest of the day.
It split at the seam in the pipe. Heat pump with low airflow, 410A, history of reversing valve wiring issues (automation system), and I'm thinking cheap pipe."
Owner's Manual Burns in Attic
HVAC contractor MichaelPaladin writes: "I went out on a 'no heat' call yesterday, got up into the attic and found this. A new furnace is getting installed Monday. What you see is the charred remains of an owner’s manual."
"Here's a coil I took out awhile back," says jimmyed.
What's wrong with THIS picture?
Blocked Filter Doors
15-ton rooftop units were installed for a brand new restaurant. When called to perform service, contractor johndief found the filter access doors blocked by drains on all of them. Brilliant!
Downflow Furnace in an Upflow Application
"I ran across this gem today on a no heat call. The more I looked at it the more I found wrong," writes 37bluebird.
"And yes, this is a downflow in an up flow application. And someone got paid to do this."
Another 'Quality' Furnace Repair . . . NOT!
"I wonder how the unit could be operating with only one wire on the rollout switch," asks dougfamous. "I also wonder what that giant red wire nut is for. It turns out the red wire nut was jumping all the limit wires together.
"Another company had fixed the nuisance rollout and limit trips by simply doing away with those 'annoying safeties.' The rollout was tripped after pulling the coil door. I shut the gas and power off, when I saw the holes in the heat exchanger. The kicker? They left the two leads on the limit so at first glance it looked like the limit was still functional."
No HVAC Filter Change in Three Years
"I got a call from a landlord, saying one of his rentals wasn't cooling. Gee, I wonder why," writes John8385. "I was told the tenant hadn't had a filter in his unit for three years. My question is, why isn't this guy keeping a better eye on his property? Well maybe a hefty bill of over four hours labor (coil box on top of a gas furnace) to clean up this nightmare may teach him . . .worst slop I've seen in my 37 years in this trade."
But I Found This Contractor on Craigslist!
nolaHVAC writes: "A customer called and said the system wasn't cooling. She had hired a guy off of Craigslist to repair it a couple weeks ago for the same problem. 'Now it won't even come on at all,' she says. "I get there and this is what I find..."
An interesting discussion with the customer ensued. Click to read more . . . bit.ly/Craigslistcrap