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Armstrong Ultra Sx80 A/C burns the transformer
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Tried to run AC for the first time this season (Furnace works fine). After looking around, the transformer was definitely burnt. Bought a new one, swapped it out (after carefully re-connecting the proper wires), and the AC worked. About a day later, transformer burned out again. Bought a new...
Armstrong Ultra SX80 not turning on by iteslf! Circuit Board?
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This all started about a week ago. One night we woke up to a very cold house. The furnace hadn't kicked on at all during the night. It's an Armstrong ultra sx80. It has the automatic ignition. When I went to check on it, I took off the panels and vaccuumed it out and noticed that when I ran the...
Armstrong Ultra SX80 Heat Exchanger Failure
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I recently experienced a series of small explosions while my furnace was operating. After extensive troubleshooting, I discovered the rollout switch was tripped, after I reset it, I watched the furnace startup properly, but as soon as the blower came on, it had extensive blowback tripping the...
Armstrong sx80
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I'm new to the sight, but am fairly handy around the house. I love doing my own repairs. My furnace would not light. The local tech that installed the furnace said he cleaned something, and the furnace has been lighting fine but the air coming out of the blower is much cooler. I had him back... View more questions Search
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