Need HVAC help

[Shawn1112]

Who is our resident HVAC Guru's? Woke up to a cold house this morning. Blowing cold air and fan continuously running. Figured flame sensor needed to be cleaned or replaced as I have had that issue before. Cleaned flame sensor and no help. Poking around the board I see a connector melted. What would cause this and can I fix or do I need to call a professional?
Pics coming

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[Shawn1112]

 

[Shawn1112]

[MENTION=111]OffshoreDrilling[/MENTION]

 

[OffshoreDrilling]

Call a pro. Looks like blower relay contacts welded. Harness and board are trashed, may have a problem with the blower as well.

 

[Shawn1112]

Call a pro. Looks like blower relay contacts welded. Harness and board are trashed, may have a problem with the blower as well.

Thats what I was afraid of, lol.
In your opinion (just dont want to get hosed) can it be repaired or am I looking at purchasing a new furnace? Furnace is about 10yrs old.
Thanks bud

 

[MrMezger996]

Yes that can be repaired. What is brand of furnace?

Model and Serial#?

 

[Shawn1112]

Got a hold of a buddy who I totally forgot does HVAC.
He already picked up a new board $100 and I will probably give him $100.
He probably wont take the extra $100

 

[GTvert90]

So for the last week or so my nest will say the system is running but it's not, it would also say delayed, making it colder than it should be.
Ran a C wire and that didn't help. Put a non smart thermostat on and it seemed to function properly for a day. So I went and put a new nest thermostat on it and woke up to a cold house.

I don't think it's a sudden incompatibility with the nest. We haven't had this issue the first 2 winters with it.

I'm now thinking it's a furnace issue. I was going to give the flame sensor a good cleaning. Other than that where should I look? Thanks guys!

 

[GTvert90]

I should also check the diagnostic LED when it's supposed to be running. Just thought of that

 

[Shawn1112]

I’d start with flame sensor, I usually have to clean mine once a year. Even if I replace it, still have to clean it once a year

 

[The Beast]

Shawn was your maid and butler cold this morning?

 

[Shawn1112]

Shawn was your maid and butler cold this morning?

They sleep in the guest house in the back, gave them the day off today

 

[The Beast]

They sleep in the guest house in the back, gave them the day off today

Shawn you are so generous

 

[Ron Vogel]

I’d change out the board and ingniter at a minimum. Easy to do, can get all the junk off Amazon

 

[MrMezger996]

It’s not the flame sensor if you replaced the Nest stat with a conventional stat and it worked. You are have connectivity issue with the nest stat.

 

[The Beast]

Shawn u up and going ?

 

[SaturdaysGS]

I’ve heard of Nests flaking out after some time, randomly, unfortunately.