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I moved to Canada and bought a Condo. At that time I used magnetic compass to found Qibla direction and offered prayer for almost more than 7 years. Now I figured out that direction is wrong and found correct direction. In the same time I offered Qada prayer for my father too. Please let me know about those prayers?
If there was slight deviation i.e. you offered prayers slightly towards the right or left of the actual direction of qibla, then the offered prayers are valid inshAllah. And if there was a major deviation i.e. you offered prayers with your back towards the qibla, then those prayers are invalid and they must be offered again. And Allah Knows the Best!