The customer stated no heat with 1 zone. The temperature was at 75 in that zone. Found the taco zone panel clicking on and off, the green power light is controlled from the 120v circuit but I had constant 120v to the board. Disconnected all low voltage wiring and the power light stayed on without issues. Jumped each individual zone with a jumper and the panel did not click off. Found the thermostat in the garage clicking on and with an error. This zone they do not really use. Once I connected all low voltage again and left that thermostat off the wall the taco panel was normal. The customer does not want the thermostat replaced right now and will leave it off the wall until she has us come back in the spring to replace it.