A man in aveilut needs a new car. The old car the family has used is breaking down more and more frequently. Is this something that should wait another 10-12 months? What if his wife purchased the car and recites שהחינו? Would the halakha be the same during the 3 weeks?
The practice of not saying shehecheyanu is recorded in the case of the 3 weeks (Shulchan Arukh OC 551:17). Poskim explicitly state that this does not apply to a mourner. See Magen Avraham OC 551:42 and Mishnah Berurah 551:98. The reason is that the problem with shehecheyanu is not the simchah per se, […]