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protecting the furnace control board from amp spikes
High-Purity Silicon Carbide: Resists oxidative wear and maintains stable electrical properties across thousands of cycles
Industrial Durability: Rated for 400 psi static pressure and 200°F media temperature
effectively prohibiting pressure mixing between separate control loops
allowing for a plug-and-play installation that doesn't require breaking the flue connection
Johnson Controls A19AAF-4 Thermostat 30067439-890 protecting the furnace control boardUtility Thermostat, 120 208 240 Vac, 40 90 Degree Temperature Range, 1. 5 Degree Fixed Differential, 6' Rubber Coated Capillary Length, Automatic Reset, Screw Driver Range Adjuster A19AAF 4 is identical to A19AAF 4C
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