2930 61st Street
Menomonie, WI 54751
715-283-4422

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Craig M.

Craig M.


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Responded to ongoing no heat issue in Lennox furnace. Diagnosed failure caused by missing strip inside secondary heat exchanger tubes, which allowed excessive heat concentration on collector box causing it to melt and crack. Replaced collector box to restore heat, documented issue with photos, and recommended contacting manufacturer regarding the defective secondary heat exchanger to prevent recurrence.

Responded to ongoing no heat issue in Lennox furnace. Diagnosed failure caused by missing strip inside secondary heat exchanger tubes, which allowed excessive heat concentration on collector box causing it to melt and crack. Replaced collector box to restore heat, documented issue with photos, and recommended contacting manufacturer regarding the defective secondary heat exchanger to prevent recurrence. Responded to ongoing no heat issue in Lennox furnace. Diagnosed failure caused by missing strip inside secondary heat exchanger tubes, which allowed excessive heat concentration on collector box causing it to melt and crack. Replaced collector box to restore heat, documented issue with photos, and recommended contacting manufacturer regarding the defective secondary heat exchanger to prevent recurrence.