My Carrier 58MCA furnace has a 66sec Blower On delay. The problem is that I have to have the fan running constantly to assist the HRV Ventilator feeding the return duct. When the Blower Fan stops for "warm up", the ventilator is blowing out the unfiltered return ducts, sending dust and crap into the air.
Can I switch off the Blower On Delay? What if the blower is running off of a FanHandler (so it's quite slow during normal Fan On)? Would disabling the Delay impede the warm-up of the heat exchanger enough to cause a severe performance problem?
How can the Blower On Delay be modified? After studying the wiring diagrams, it seems that the feature is not field adjustable.
Peace, Dan