The fact that the furnace is 6 years old, there's a 100% likelihood that it's a high energy furnace with no chimney but utilizing PVC piping, the "rain" is more than likely condensation which the new furnaces produce. I'm also thinking that since this person posted this several month ago, the problem has since been resolved and the tech found a malfunctioning CPU.

incorrect
they still sell 80% furnaces - $500



it sounds like it only happens when it rains
most likely not condensation based on the limited information provided



the motherboard has nothing to do with rain or condensation

if the motherboard failed the furnace would NOT work and there would be NO condensation on a non-running furnace

No contest, I'm a electrician who have installed and wired hundreds of furnace, I bet the ranch that you don't even know how to diagnose a motherboard or secondary fan. BTW, 80% or 95%, neither requires a chimney and both produces condensation.

wiring a furnace is far different than installing the entire unit

wiring 101

black wire to black wire (hot)
white wire to white wire (common)
ground wire to ground wire (bare copper wire)

LOL




inducer...

you will lose your ranch...
is it a motherboard or a ?

LOL



80% requires a metal vent pipe (flue) to a chimney or double wall exhaust pipe as the temperatures are too high and it will melt a pvc/plastic exhaust pipe

20% of the heat the 80% furnace produces goes out the exhaust and that is why the rating is 80% (100%-80%=20%)

the exhaust temps are much higher compared to a 95% furnace

the 95% can be vented with pvc/plastic line as the exhaust temperatures are low enough that it will not melt the pvc exhaust line

only 5% of the heat the 95% furnace produces goes out the exhaust and that is why the rating is 95% (100%-95%=5%)

a 'chimney' is required if the exhaust lacks a fan aka 'chimney effect'

but of course you knew all that

poster '123' and poster 'Creeper' had two different unrelated problems

one (123) had a bad motherboard and the other (Creeper) has a condition when it rains

yes I'm laughing son, ever run a furnace without electricity?
Once again, we won't get into a nonsensical debate for the reason that the furnace is fix and I've forgotten more then you'll every comprehend. Post your electrical license and DBA....what? you don't have either? Not surprising none whatsoever. We're done here.

thought you state that it was 100% a high 'energy' furnace and not an 80% furnace?

the term is high EFFICIENCY furnace not a a high 'energy' furnace...

an 80% furnace can not be vented with a plastic pipe because it will melt the pipe

if you have a natural gas water heater it most likely is vented into a metal pipe
because it is most likely an 80% water heater

better not touch the metal vent pipe of the water heater when the unit is on or you will lose some skin

ROTFLMAO, funny how one post sends a squirrely individual to village idiot heaven. Tell me Blue, explain a diode and what is it's purpose, explain the mechanics of a onan generator, tell me how would you wire a disconnect switch and would your install it on the generator or service box? In regard to a 100% furnace, show me where I stated something as stupid as what you implied. Finally, on your test, explain a copper magnet function?

good for you




if you go over to a clients home because their light fixture is not working
you determine that the fixture only has one bulb and that the one bulb is blown
you replace the bulb

do you then go home and tell your friends that becuase you replaced one bulb in a light fixture that you have the knowledge to build that entire home?

LOL




keep backtracking...




ever heard of a LLC?

I own an electrical business and you?

sometimes the easiest thing to check first is if the thermostat has batteries to check/replace the batteries

BTW, I had a house built in 2013, guess who designed it, wired it, installed the boiler, ran the tubing, hot water heater, kitchen etc. It's a pretty cheap proposition when someone else can dig the basement, build the blocks, frame, roof, sidings, windows, insulation, drywall and you take it from there, now once again, your expertise is what?

Better yet, grab a fluke meter to see if 220 is there, if there's no current, check the breaker.
They call your style of operation "A##%$ Backward."

thought you were a HVAC installer?

furnaces run on 120 volts not 220 volt
most homeowwners do not own a meter for testing voltage or know how to use it



or just check the breaker first because most homeowners do not own a test meter



the batteries in the thermostat are more likely to run out of a charge before your situtation would present itself especially if the thermostat operates the furnace and the air conditioning functions

but you knew all that...

One problem, idiot (you) fails to acknowledge that new furnaces have mother boards which have the ability to do self diagnosis, which reveals another fact, said idiot do not know the codes being displayed on the motherboard. Tell me, do you test your batteries by the old method of tongue being placed on battery terminal?

What happens if the batteries are proven to be good? secondly, a thermostat is wired to 24 volts DC and the batteries are solely for the benefit of maintaining your preset programs. You know what they call people like your self? Fool or emergency room patients.

when I reference the thermostat it was regarding the air conditioner problem

air conditioners do not have self diagnosis codes

it is you that has gotten off track - yet again

False once again, ACs all have mother boards, look it up before embarrassing yourself once again. Solenoids, switches, resisters are now integrated into the motherboard. In your case, you must first first get on track before derailing yourself.