My 4 yr old Lennox XP14 lost its refrigerant 2 yrs ago. Lennox dealer said leak was in underground lines. Didn't seem right. My son (a builder) had a friend come out while we were gone. Friend is not licensed but his firm is. Friend found a leak near the TXV valve on the suction line. He braised it and added the refrigerant without our knowledge. He did the work on his own, not through his company so no receipt. Worked fine. A year later, started having problems with breakers tripping. Replaced breakers. Also had to replace a heat sequencer. In Jan. our electric bill was high, then Feb. was quite high. Found the breaker to the outside unit was tripped. Called dealer.... couldn't find the problem. He called another heat pump dealer in our area. 2nd dealer came out, said our compressor is bad. In the process of replacing it. Still under warranty. Question...... will the repair done by the friend void the warranty?