Furnace Cycling - SOLUTION w/ Pictures
EDIT: This turned out to be an air flow issue. The solution was quite simple. The furnace has three knockouts on the back when using flexible vent duct adapted to hard in-floor ducting. Crossroads has...
Forum Discussion
bmupton wrote:JJBIRISH wrote:
read the same thing here several times about builders not following mfg. instructions for furnace installation causing air flow issues, mostly short cycling… not very uncommon…
I’m not completely sure the mfg.’s bother to read the instructions even, per my earlier post about air volume and number and location of ducts… it a good idea to keep the manuals handy…
I'm being lambasted over in the mods forum for not following manufacturers instructions as well...I mounted my supply duct closer than 2' to the cold air return.
A slightly modified design where the cold air return is on the left and duct is on the right should satisfy that requirement, but the way I set it up was to direct the air from that duct up and away so that it wouldn't draw it's own heated air back inside.
At the end of the day, the furnace is no longer short cycling, and I've followed almost all of the manufacturers instructions, minus the 2' rule. I may build a modified panel to address that yet.
As long as it’s working the way you did it, you did much better than they…
BUT it’s their responsibility to know and do these things right not just for your sake, but everyone with that model…
the heck of it is they do it without cabinets and other obstructions in the way that make it more difficult…
Good job… I would be carful and not go any smaller on the intake vent and restrict at the other end of the furnace…
