Take the next call Random unsolved ticket (91 on the board) On a real call right now? The Copilot runs it with you — live field mode, one question at a time, evidence before parts → 01 Whole system dead 0/8 02 Outdoor unit dead 0/16 03 Runs but won’t cool 0/19 04 No air inside 0/6 05 Acting possessed 0/7 06 Blows fuses 0/5 07 Gauges on — pressure problems 0/10 08 Wrong part, wrong size 0/6 09 Heat pump — wrong kind of air 0/6 10 New install — A2L start-up 0/8 Working on a specific brand? Find it in the equipment guide — every brand links to the practice that fits it → Reading the board
Tier 1 · Straight shot One clear fault. Trace it, find it, fix it. 6 meter tests before efficiency points come off
Tier 2 · Got a twist A red herring, or the break is a leg further than it looks. 9 meter tests before efficiency points come off
Tier 3 · Callback maker Multiple faults, lying symptoms, or a trap that condemns the wrong part. 12 meter tests before efficiency points come off
Showing the next 3 open tickets per category Expand all categories ▾
01 Whole system dead 0/8 closed
Nothing runs. Often traced far upstream.
No cool, no blowertier 1 of 3: Straight shot AC quit last night. Thermostat screen is on, set way down, but nothing runs — inside or out. Everything dead, tstat blanktier 1 of 3: Straight shot Nothing at all runs and the thermostat screen is blank. Blank tstat, furnace has powertier 2 of 3: Got a twist Thermostat blank, nothing runs. Furnace switch confirmed on.
Show all 8 calls ▾ 02 Outdoor unit dead 0/16 closed
Indoor blower fine, condenser silent.
Outdoor unit deadtier 2 of 3: Got a twist Blower runs fine inside but the outdoor unit is completely silent. Outdoor unit dead (again)tier 1 of 3: Straight shot Indoor blower works, outdoor unit totally dead. Landscapers trimmed along the line set last week. Outdoor dead after attic cleanouttier 1 of 3: Straight shot Outdoor unit stopped the same day the homeowner cleared boxes out of the furnace closet.
Show all 16 calls ▾ 03 Runs but won’t cool 0/19 closed
Something turns on. Cold never comes.
Compressor hums, tripstier 2 of 3: Got a twist Outdoor fan spins, house blower runs, but it never gets cold. Something hums, clicks off, then tries again. Loud hum, zero coldtier 1 of 3: Straight shot Fan runs outside, compressor just hums loudly then goes quiet. Top of the capacitor is visibly domed. Fan needs a pep talktier 1 of 3: Straight shot Outdoor fan won’t spin on its own — hums and twitches. Homeowner has been starting it with a stick.
Show all 19 calls ▾ 04 No air inside 0/6 closed
Condenser runs, registers stay still.
Cold outside, nothing at the ventstier 1 of 3: Straight shot Condenser runs great. Zero airflow from any register. Coil is about to become an ice sculpture. Blower hums, barely turnstier 2 of 3: Got a twist Blower hums and the wheel creeps around lazily. Almost no air at the vents. Outdoor runs, blower never joinstier 2 of 3: Got a twist Cooling call: condenser fires right up, indoor blower never starts. No click from the board area.
Show all 6 calls ▾ 05 Acting possessed 0/7 closed
Won’t stop, half-works, or flickers.
Outdoor unit will not stoptier 2 of 3: Got a twist Condenser runs 24/7 — thermostat off, doesn’t matter. House is 61 degrees. Homeowner pulled the disconnect to make it stop. Runs with the thermostat OFFtier 2 of 3: Got a twist Cooling runs even in OFF mode. New thermostat was installed by a handyman last week. Blower has run for nine daystier 2 of 3: Got a twist Indoor blower never shuts off, in any mode, at any temperature. Homeowner has been sleeping with earplugs.
Show all 7 calls ▾ 06 Blows fuses 0/5 closed
Something upstream is protecting you.
Fuse pops on a cool calltier 3 of 3: Callback maker Every time the AC tries to start, the little board fuse blows. Third one this week. Fuse blows since the new filter racktier 3 of 3: Callback maker Board fuse blows on every cool call. Started right after a filter-rack retrofit at the air handler. Fuse blows on FAN, not just cooltier 3 of 3: Callback maker Board fuse blows even with just the fan switched ON — no cooling involved. That detail is confirmed.
Show all 5 calls ▾ 07 Gauges on — pressure problems 0/10 closed
Hook up the manifold. Read the nameplate first.
Runs all day, house stays warmtier 2 of 3: Got a twist Everything runs — blower, fan, compressor. House crawls down two degrees and stalls. Electric bill doubled. Old unit, weak cooling, R-22 nameplatetier 2 of 3: Got a twist 2006 condenser, cooling faded over a month. Homeowner asks you to “just add a can of Freon like the old days.” Retrofit unit reads “wrong” on gaugestier 3 of 3: Callback maker R-22 system retrofitted to R-407C last year. New tech hooked gauges, got confused, left. Cooling is genuinely weak.
Show all 10 calls ▾ 08 Wrong part, wrong size 0/6 closed
It runs. That does not make it right.
New cap, still weak on hot daystier 2 of 3: Got a twist 3.5-ton unit. A company replaced the capacitor six weeks ago. Cools fine in the morning, struggles every afternoon over 95°. Breaker stopped tripping — is that good?tier 3 of 3: Callback maker 3-ton condenser. Breaker used to trip on hot days; a handyman "fixed it for good" last summer. It hasn’t tripped since. Trips every afternoon since the upgradetier 2 of 3: Got a twist 4-ton system installed two months ago replacing a 2-ton. Breaker trips almost daily once it gets hot.
Show all 6 calls ▾ 09 Heat pump — wrong kind of air 0/6 closed
One valve decides which way the heat goes. Follow the O.
Heat pump blowing warm — new puppytier 1 of 3: Straight shot Heat pump runs on a cooling call but the vents blow warm air. Started the week the new dog discovered the side yard. Cooling call, heating resultstier 2 of 3: Got a twist Heat pump cools fine all last summer, heated fine all winter — now every cooling call blows hot air at the registers. Blows heat since the smart tstat installtier 2 of 3: Got a twist Homeowner self-installed a premium smart thermostat on a heat pump. Now cooling calls produce heat. He has theories.
Show all 6 calls ▾ 10 New install — A2L start-up 0/8 closed
Practice drills for the START-UP GUIDE (top nav): nothing is broken — commission it.
First start-up: board still on factory defaultstier 1 of 3: Straight shot NEW INSTALL — commissioning. American Standard 4-ton R-454B split, set and brazed yesterday. Air handler board has never been configured. Start it up and prove it out. New heat pump won’t cool, board flashingtier 2 of 3: Got a twist NEW INSTALL — commissioning. American Standard R-454B heat pump: blower runs, outdoor unit never starts on a cooling call, air handler board is flashing a code. New system, forty feet of lineset, weak numberstier 2 of 3: Got a twist NEW INSTALL — commissioning. American Standard R-454B split with a long lineset run to a detached shop. Runs, cools some; final charge was never trimmed.
Show all 8 calls ▾