Any HVAC guys on here?

[PabloCruise]

The furnace is struggling to make heat this morning.
It is about 15 degrees here, Thursday is supposed to be -15 for a low.
Our thermostat has the furnace kick on ~4:30 AM and start heating from a low of 62.
When I got back from swimming at a little before 8, the temp is at 64 inside, hmm.

 

[PabloCruise]

Furnace is a Bryant, HF, installed when the house was built in '09.

 

[PabloCruise]

Series B, Model 340AAV060100

 

[PabloCruise]

TIA if anyone knows some things, I can go into more detail.

 

[GLTHFJ60]

@Roxx

 

[Roxx]

Clean the flame sensor. You can follow sequence of operation and see where it stops. But it sounds like flame sensor or the pressure switch is not making some times.

 

[BigBoy40]

I had to replace a bunch of these secondary heat exchangers. Not knowing your actual running conditions make this a guess at best. The things to check are your burners to see if they are all running like they have when it was running good. That means a good strong blue flame being pulled through the furnace. The only thing the homeowner can typically do is keep the filter clean, make sure the blower comes on. There is a lot of info available on sights like HVACTALK. Here is something on the heat exchanger problems your model have. Carrier and Bryant are owned by the same company: Carrier Heat Exchanger Failure - https://www.furnaceacexperts.ca/carrier-heat-exchanger-failure/

 

[PabloCruise]

Thank you guys!
My issue was the furnace would sometimes throw Code 13, where the limit switch would not re-make.
I opened all the vents, and changed the filter.
I figured I had to check the evaporator coils…

 

[PabloCruise]

Are y’all ready for this?

 

[PabloCruise]

What the heck?

 

[PabloCruise]

The poor furnace.
I am amazed it was able to heat at all.
Obviously my filter setup is less than optimal.

But for now she is heating the house like it used to.

 

[fjc-man]

You’re supposed to replace the damn filter every 3 months.

 

[PabloCruise]

You’re supposed to replace the damn filter every 3 months.

Ha ha, I change mine every month.
Don’t I feel silly?
I even buy nice filters.

 

[fjc-man]

Ha ha, I change mine every month.
Don’t I feel silly?
I even buy nice filters.

Do you have a half dozen sheepdogs?

 

[PabloCruise]

Do you have a half dozen sheepdogs?

Well…
We have a GSD, aka “German Shedder”, a Border Collie (also hairy), and a Chihuahua.
We used to have a Maine Coon who put out a respectable amount of hair.

 

[fjc-man]

Guilty as charged

 

[PabloCruise]

Happy to report the furnace ran just fine yesterday when the outside air temp did not get above 0F.
It took a while to get the house up to temp, but no errors.

 

[PabloCruise]

My New Years Resolution is to come up with a more effective furnace filter!

 

[WarDamnEagle]

My New Years Resolution is to come up with a more effective furnace filter!

They sell them everyday.

 

[PabloCruise]

I had to replace a bunch of these secondary heat exchangers. Not knowing your actual running conditions make this a guess at best. The things to check are your burners to see if they are all running like they have when it was running good. That means a good strong blue flame being pulled through the furnace. The only thing the homeowner can typically do is keep the filter clean, make sure the blower comes on. There is a lot of info available on sights like HVACTALK. Here is something on the heat exchanger problems your model have. Carrier and Bryant are owned by the same company: Carrier Heat Exchanger Failure - https://www.furnaceacexperts.ca/carrier-heat-exchanger-failure/

Darn dude - this is money...

The furnace started cycling again, the house fan would cycle off and then back on before the desired temp was met.

She was throwing code 33 - the flame rollout switch/temp sensor was opening. It did feel hot around there.

I went back in to the AC condenser and there was a little bit of dog hair and lint. I cleaned that, new filter, no difference.

I checked your link and sure enough, my Bryant 340A looks like it is covered for a warranty replacement of the heat exchanger. Not sure why it was all good until just recently?

It looks like it is going to be a project...
Carrier Heat Exchanger Replacement - https://www.furnaceacexperts.ca/carrier-heat-exchanger-replacement/ This doesn't show any details about how to do the actual replacement. Maybe they discourage that?

It also looks like I need to have an inspection by a certified tech to claim. It doesn't look like I can just phone it in. Any advice before I call a guy?

Thanks all!