We had yearly tune up done and it worked fine before they came. They said there was a crack so $600 later we had the part changed. That night it started making a lot of noise. They came out the next day and couldn't find anything wrong. We called again when it didn't stop a few days later. They never called back and now our furnace won't even come on. We have a newborn at home and it's 10 degrees outside with no heat!!
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