Heating doesnt work
could someone please help me with my heating issues. i have a luxaire dual stage furnance 100btu ( my sq ft for my 2nd floor is only 1025) and the furnace is only for 2nd floor only. the model # is TM9T100C16MP11 -95% 2 STAGE PSC 100BTU 16CFM M. The ac condenser i have is a carrier- model # 24Abb336A0031010 which i believe is a 3 ton unit. (is that a problem the differences in ton btw furnance and AC, aslo do i need 100k btu for 1025sqft) the problem that i have is that my heat turns on for like 15mins and then shoots out cold air. and all i hear is the fan blowing, i dont hear the noise of gas or anything. I checked the code it says that is something to do with pressure switch. Also my ac/heating contractor screwed me up big time and dont think did a proper install. he cut a hole next to the return air bec i think the return air vent was 2 small. Now i been getting quotes to redo everything for 3-4k. I will be uploading pics. Any info would help me out.