Water source heat pump thunder noise.
Cold Flow Model # CFX041V-SS-R5 No bells or whistles.
For the last week and a half. Furnace is in basement. Began hearing a noise like a thunder storm dissipating. When check furnace, taco water valve light is off, compressor kicks out, but blower motor is running erratic. Take panel off and the noise is from blower motor changing speed. Shut off breaker, turn back on and it runs normal again. The furnace cannot be shut off from thermostat. Must be turned off with electric breaker. The problem gradually becomes worse. First time, took a week before symptoms would happen again. Then 12 hours, now 2-3 hours.
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