Hello.. My less than two year old heat pump system failed the other day, complaining of an L1 error. I called the service personnel, and they discovered a large rat living inside it!
Apparently its urine made the card short circuit.

They claim this voids the warrantee and I have to pay over a thousand US dollars to get a new card!

In your opinion: 1) Is it the fault of the customer that a device is made so a rat can get inside it?
2) Where can I find a replacement main pcb that's more reasonable?

Obviously the heater no longer works, and its pretty cold, so I'm pretty upset about the whole thing

Many thanks, -turgut