I've got the Thermador double oven with two convection ovens and integral microwave that is a year or two older than your model. My circuit board went bad about three years ago. I had it repaired because at $400 I was willing to take the risk. I didn't want to spend another $4,000 to replace it. My repairman did clue me into not using the self-cleaning mode in the future. You will find that advice repeated for a number of brands of ovens on this forum. Regarding our ovens the specific problem is the placement of wiring and relays too close to the heating elements. The high heat of the cleaning cycle fries the circuit board. If you can't find a replacement circuit board, they are hard to find, I saw a thread on this forum to a company that will rebuild your circuit board for a reasonable charge. You will have search for it. I didn't book mark it, sorry. Bottom line, I'd keep it if I could get it repaired.

There's not a significant difference in energy efficiency from one dryer to another of the same fuel type, gas or electric. All of them heat the air/clothes and extract moisture. Gas burners and electric heating elements all have the same efficiency from one to another. Increasing airflow rates is perhaps the only factor in faster drying rates for less time and energy usage. Very old and worn units may have some inefficiencies from worn drum seals but that's usually not significant unless the seals are torn or completely worn away.

I think it really depends on how much you like the unit. If you like the performance and features I'd say fix it. Seven years is not that old. Also, a new European front loader is going to cost well over $1,000.

Mihojas, I totally feel your pain. In fact this post has brought back some of the hurt feelings and frustration I had during our kitchen reno which is now 7 years old. CANNOT believe it, but I have the receipts and FB photos to prove it! I won't bore you with all the details, suffice to say that I could probably write a book about the troubles we had. Our Granite woes began with the night (few days before Christmas so freezing cold that it took what seemed like hours for granite to thaw) of install. By the time all these men left my kitchen, I realized that they had granite running in all different ways and seams were atrocious! We ended up having two pieces replaced, fine. There was a broken piece in back corner of another piece that I knew would get covered up by backsplash, and even though they offered to replace that piece too, I said it was fine, and it was, no need to replace it. Anyhow, fast forward a few months to when new granite comes in, grain is going the correct way, but this granite doesn't match the pattern of the old pieces that were staying. A couple of weeks in, the peninsula starts cracking...long long story short, they decide to just replace all the granite and make sure it is cut with the grain and pattern all going the way we want/specify... Meanwhile, six/seven months after initial order the granite for my pony wall finally arrives...fabricator spends most of the day installing the two pieces (16 feet long). As I inspect it before he leaves, I notice one piece is cracked completely in half, can't remember now if there was even any attempt to repair it. He admits he broke it at the shop before he loaded it onto his truck. I was sick...went into DH's den and said I cannot deal with this, granite is cracked in half and Allen was just going to pretend nothing was wrong... Anyhow, that granite ended up being completely replaced. It all broke when they took it off, so there wasn't the possibility of just fixing the broken half. I won't continue with further granite stories...but do have to say I was appalled at how relatively nice people who I thought I had a decent relationship with tried to 'pull the wool over my eyes'. I think I am very reasonable, perhaps even close to being a push-over, but dealing with this company actually taught me the valuable lesson of learning how to speak up for myself, and learn how to demand being treated with respect and with honesty. I think that is all you are demanding. Just so you know, I have now learned to live with that crack in the peninsula for 7 years...company went bankrupt the DAY my granite was scheduled to be replaced. I paid for a fairly decent repair with the money I never had to pay for my granite.