850 ABS-unit failure in hot weather after first resoldering?

It´s done now. I went to a local electronics repair shop, yes very few of them
are still around nowadays here, chatted quite a time with the guy there. He
resoldered it for a reasonable price, told me that it was a nasty job to get the
contacts cleaned. He suggested to istall it first preliminarily to check
function and heat tolerance, all ok now, so today I sprayed the
electronic-circuit-sealant onto the circuit, sealed the lid with a silicone like
high temperature resistant sealant, changed the screws and hopefully will never
never have to bother about the unit.
Thanks again for any input
Franz47, Vienna, Austria