Silvia Pro X repair and spare parts questions
Hi everyone! About 3 months ago I took a leap and bought myself a used Silvia Pro X and a Eurika Silenzio. Previous owner was super helpful and answered all my many questions, he said he owned the machine for about 2 years, and I have no reason not to believe him.
The machine worked well for the most part, and I even pulled a few amazing shots and made some nice latte art, but I noticed two problems: wierd whizzing noizes at startup (with full water tank) and watery pucks no matter the grind size or the beans. Other than that no major problems - heats up well, good steam and decent stability, pressure gauge shows around 9,5-10 bars during extraction.
This week I decided to get it checked and sent it to a local repair shop - not authorized by Rancilio, but there are no authorized once where I live. What the repair guy said after a few days of testing surprised me - he said there's a lot of scale buildup inside (I only used reverse osmosis the previous owner claimed to only ever use filtered water) and the 3-way solenoid valve is faulty, it "only opens to a 70% of what it shoud".
What shocked me was the price he asked - about $500 for the spare parts and work, which is: replacing solenoid, "deep clean" (descaling in baths and with ultrasound) and replacing all the fittings and gaskets. The bulk of the price - as he said - is the new solenoid. Said "deep clean" alone can be done for about $120, but in that case there will be no warranty on the repair.
I bought the machine for about $1300, so paying over third the price for repair seems unreasonable - or is he correct and 3-way solenoids are that expensive? Or is the guy trying to scam me out of my money? I'm not in the USA, so for comparison a 250 gram bag of really nice beans is around $15.
I searched on the web but still can't be sure what specific replacement part do I need - I found a few valves for regular Silvia, will those fit?
For now it seems like the best idea is to pay $20 for the diagnostics and take SPX home to try to fix it myself.
I'll be grateful for any feedback.