We had our HVAC replaced back in Dec. and since that time our gas bill has tripled and the system doesn't run anymore than the old one did. We keep our house at 68, we have a nest thermostat and the company who installed it has been out 3 times to take readings and check for gas leaks. We went from using an average of 18 therms this time last year to our highest therm usage ever which was 47. Last three months since the furnace was installed was 37, 45 and 47 therms. We live in Az. and the coldest temps we had this year in the morning was 32. My system run time is low in my eyes. Based on what I have been tracking from 16 March to now our system has run 4 hr. 30 min. I'm at 26 therms right now. We have a hot water heater and gas stove and range. No leaks there either, already had them checked. Getting very frustrated because we upgraded our 20 year old system in fear of it failing during the summer at some point. Now wishing we would have just stuck with it. Installation company is at wits end or maybe doesn't have someone experienced enough. They did adjust the first stage and second stage even though he said it was within the manufactures level. Frustrated. Thank you for any advice.
What is the model number? We can see if there are any error codes stored on the control board.
Do you use natural gas or propane? I know sometimes during Covid the utility company was not coming out to read the gas meter and were simply estimating. If you have a gas meter, I would call in the reading or compare it to your latest bill. Likely gas prices have increased significantly since last year as well.
It may be worthwhile to hire a third-party to come in and check all the gas appliances, and test the gas lines for leaks.