Springtime HVAC Repair near Liberty Grove Elementary. Residential service call in Rowlett & Upon arrival found thermostat giving error code 434. Checked outdoor unit and found that it had no incoming power. Checked breaker box and found breaker off. Turned breaker on and breaker tripped. Pulled disconnect out and tried to reset breaker but it tripped again. System has a bad breaker and breaker would have to be replaced by electrician