Furnace tune ups should take anywhere from 45 minutes to hour and a half, depending on what the technician has to deal with when he gets there. I was a heating and AC professional for over 10 years and I had tune ups that only took me 30 minutes, and others where it seemed like I had to practically disassemble the entire furnace, clean, then put back together. Every call is unique. However, it's important you trust your contractor. Your instincts are more accurate than you probably give yourself credit for. I don't remember a tune up ever going less than a 1/2 hr in my 10 years of experience. It just takes time to setup, take down, and perform the actual maintenance. If you figure a minute per inspection point, it should have at least taken half an hr. I've showed up to furnaces that look flawless, and I still take them apart and clean them because that's what the homeowner paid me for. If there is even a hint of a cracked heat exchanger, get a second opinion. There are scams out there, and unfortunately a 20 minute inspection wouldn't reveal that. Have whomever is making the claim show you via camera or by physically removing the combustion chamber from the furnace and showing you. As weird as that sounds, I've removed heat exchangers out of furnaces just to prove that there was an issue. A cracked combustion chamber can be a serious issue, so the fact that he said it should be fine says either he doesn't know what he's doing or he's not being truthful, or both. It's not that cracked heat exchangers are leaking carbon monoxide, it's that they can. It's the potential that makes it dangerous. Hope this helps!
In the combustion chamber, fuel mixes with air and is ignited, generating heat—as well as carbon soot, water vapor, carbon dioxide, and worse. A buildup of soot can cause the chamber walls to corrode. Richard scrapes out built-up carbon using a small wire brush. Then he removes loose material with an industrial shop vacuum and inspects the chamber for holes or corrosion before replacing the cover.
Another energy savings tip, HVAC professionals say, is using a programmable thermostat. A programmable thermostat can save you up to 10 percent on energy bills, if you dial it down seven or eight degrees from the normal temperature setting — the U.S. Department of Energy recommends a setting of 68 degrees — for eight hours a day, whether it's during the work day or at night, according to DOE.
If your furnace has a pilot light, look for the flame. Check your owner’s manual or the instructions posted inside the furnace cabinet for step-by-step lighting instructions. Usually this involves first turning the gas valve to Off and waiting a couple of minutes. Then you turn it to Pilot. Next, press and hold it down while you light the flame. Last, wait a minute or so, release it, and then turn it to On.
Heating Repair Company CO
Customer stated their blower fan is consistently running. She has had the furnace off all summer and just fired it up and it will just blow consistently. Upon investigation, the technician found that the damper control was sending 24V to G terminal while switched off. This indicates a stuck closed relay. I disconnected it and tested the unit. Due to age of unit, I would recommend upgrading to a more efficient model.
2Be sure the furnace’s circuit breaker is on or that its fuse has not blown. Check both the main electrical panel and any secondary subpanels that supply power to the unit. If the circuit has blown or tripped, reset the circuit breaker by flipping it all the way off and then on again. Or replace the fuse. If the circuit blows again, there is probably a short in the electrical system providing power to the furnace. For this, you may need to call an electrical contractor.
Cleaning the debris that builds up on your filters will aid with the flow of air. When your air filter is clogged, your air handler must work harder to compensate for the blockage of air flow. In addition to driving up your utility bill, the reduced air flow through your heating and cooling system can cause your heat exchanger to overheat and shut off too quickly.