The repair tech says my Lennox Pulse gas furnace is fine and that the thermostat is fine also. However, even when it says it is 75 in my house, I am still cold. When it is 75 at work, I'm "toasty". The technician did say replacing the "U" coil may help (he didn't look at it yet), but it is expensive to do that. Could it be my furnace - what could it possibly be? I know I am cold blooded, but at work I'm fine, but always cold at home. I've only noticed this over the past year and I have had the Lennox unit for about 15 years.

Have you checked the temp. against a different thermometer