need to move lots of air

______________________________________________________________________ If you read the posts all I wanted to do was hook up a used blower I salvaged to pull air thru some duct work to the outside. The blower motor has four wires. White,red,blue and black.A sticker on Continue reading

Energy efficiency of HVAC systems

______________________________________________________________________ I have recently taken a new job and one of my responsibilities is to look into monitoring energy efficiency of HVAC systems in large office buildings. Can anyone give me some ideas on what I could start looking at? Continue reading

AC dripping condensation all over furnace

______________________________________________________________________ Hi folks. Last month I had a brand new Lennox furnace & AC installed in my basement. Used it probably for a full week a couple wks ago when it was really hot. Didn’t notice any issues. Had it Continue reading

Payne furnaces??

______________________________________________________________________ What do you think about Payne furnaces? I need to replace my old furnace of 12 yrs due to a cracked heat exchanger and one of the brands brought up was Payne model PG9M. SLC Replies: fitter597 “Re(1):Payne furnaces??” Continue reading

Five year heat pump blues

______________________________________________________________________ Tech just told me I got a leak in system…He don’t know where but thinks its indoor a-coil…he doesn’t do leaks….gotta send out a leak check specialist..The same company that sold me this has a service agreement to check Continue reading

chiller error

______________________________________________________________________ good day every one,i am a new member of HVAC -Talk ,i am an operator of 800 tr Centrifugal Trane Chiller,last night ive incounter this problem regarding this, capacity limited by vane open travel stop, i only check fittings Continue reading

Honeywell RTH7500 Wiring question

______________________________________________________________________ I am switching my old thermostat (Friedrich 3AA T82 B3 C1) to a programmable Honeywell RTH7500, but I am uncertain about where to attach(/not attach) the W1, W2 and the 5. I have a Friedrich heat pump model # Continue reading

Tempstar 2000 – Contactor clicking

______________________________________________________________________ All – I was hoping one of you could help with this problem that has been plaguing me for the past week. The contactor in the compressor unit is cycling. It starts up fine (fan/compressor) and then after running Continue reading

Chronotherm III Replacement Help

______________________________________________________________________ Hello everyone. I could use some help from anyone willing to provide it. I’m trying to replace a nearly 20 year old Honeywell Chronotherm III with a new Honeywell 7400. I have a Carrier Tech2000 with an FB4 fan Continue reading