On the roof, there are 12 SEER 10 AC units for the central air for each unit. The small white compartment box is open and it says UP/DOWN - that you can take the cartridge out to shut the AC unit off. Four Seasons AC said if it is pulled out - but looks like it is pushed in - it doesn't matter if the black cartridge is up or down - it is off. BUT: they said the heat to the Rheem and the furnace fan should still go on even if the roof AC was off. The heat and the fan on the Rheem do not go on. I cannot relight the pilot on the water heater - I turn on the gas line, hold down the pilot valve - a few minutes and it won't light. I cannot find a way to turn on the Rheem Criterion II gas/AC unit. What else needs to be turned on? Thermostat (Honeywell) does not ignite the AC or fan or heat - but it could not possibly be the thermostat as the person who shut off the fan switch - also turned off the water heater. Can anyone tell me how to get back on the furnace/AC in the closet - and did the bully per chance just take out the cartridge to the AC on the roof without worry of electric shock? If it is not pushed in - do people feel it is safe to just push it back in? Four Seasons AC/Furnace said the AC circuit breakers are connected to the roof AC - and the furnace circuit breaker is connected to the closer furnace/AC. Thanks.

I recently bought a 2800 sq ft house and am having trouble with getting the central A/C to actually cool the house. The house is 1 floor (1350 sqft) with a basement. I had to replace the thermostat, and all seems to be working there, and the heat worked great over the winter, but the A/C just seems to be unable to cool the house, even 1 degree, no matter the outside temp, it just runs for hours with no change. The air blowing feels plenty cold, but maybe a bit weak from most of the vents. I checked and replaced the filter ( one of the first things I changed, the previous owner rented it out and the tenants never cleaned anything and it was really bad), I tried opening and closing some of the vents to see if that made a difference in air pressure, but if it did it isn't particularly noticeable. Some vents throughout the house definitely have more pressure than others, even if they are only a few feet apart, but anything I do doesn't seem to effect the airflow. I opened up one of the return vents, and it was really dirty, I cleaned it out the best I could, but I don't know if the lack of cleaning by the previous owners has led to an actual issue with airflow from clogging the vents, or if the system is just too weak for the house, or if there is some other issue I'm not aware could cause this kind of problem. Everything seems well insulated, except for the garage, but I barely had to run the heater over the winter and things stayed warm as long as the door to the garage was closed. I checked seals in windows/doors and can't find where heat could be coming in. So I am at a loss at this point as what to check next. I've contacted a few HCAV companies in the area, but it seems most want upwards of $200 just to come look at it, so I thought I'd see if theres anything else I could check/try before having one come out. Thanks for any help!