I say this furnace has multiple problems causing the furnace to
intermittently cycle the burners.
a. over heating "temp rise"
b. venting & combustion piping (minor)
c. draining issues
a. Temp rise is to be with-in 40-70 degrees
(blower @ mid-hi.."which it's on", will flow at 1209 cfm @ .1 ESP
.....to give a delta of 69...."max rise right there", and I'd be
suprised if your running at .1 ESP)
b. Venting requires DWV long radius 90 to be used.
1. to extend 8" minimum past structure.
2. no 45 on outside flu pipe
3. move decking boards....it's recycling the flu gases
c. Draining issues:
1. hoses need slope to trap assembly
2. trap assembly needs vent hose to transition assembly
3. cut hoses to length
a. Did the installing company run a Manuel J & D on your home?
(it may not require the 100K Btu. furnace...)
b. Supply Trunk measurements?
c. Supply laterails...sizes?
(15.....3 are off....what's left...12-6"??)
(flex off off plenum....8"??)
d. Return grill sizes?
e. Coil box used? or coil installed in plenum?
f. Water on bottom shelf....
(flu coupler leaking?)
g. What's the temp rise?
a. Furnace on concrete (will rust bottom)
b. No vent/clean-out on evap coil drain.
c. Duct tape on plenum box (run out of foil?)
d. Insulation on bottom of supply duct (needs taped...3-5' in front of
e. Suction tubing for evap coil needs insulated (will drip on furnace)
f. Duct tape on left side of furnace, why? (plug should stay by itself)
g. Move electrical junction box behind on/off switch
h. Re-caulk vent/comb piping
1. tripping on limit
2. drain issues
3. run manual J & D
side note: extend pop-off on water heater
Click to see the full signature.