32104056-20 — Temperature Selector Valve Repair & Overhaul

Component Overview

A temperature selector valve sets cabin or zone supply temperature by proportioning flow between hot bleed and cold air-cycle air, blending the two streams to achieve the crew-selected or controller-commanded temperature. Classed as a pneumatic valve in air management, it uses a modulating element such as a butterfly, spool, or proportioning poppet driven by a controller signal, electric actuator, or thermostatic input to vary the hot/cold split. Operating across a wide temperature range, it degrades through actuator and gear wear, butterfly or spool and bearing wear, seal hardening, spring fatigue, and contamination that causes sticking, hysteresis, or hunting, producing poor temperature control or inability to reach setpoint. Overhaul replaces seals and worn dynamic parts, refurbishes the modulating element, recalibrates the actuator, and verifies blend authority and leakage.

Aircraft Application

Part number 32104056-20 (Temperature Selector Valve) is installed on the Beech 400. QTC supports operators and MROs servicing this platform with certified repair and overhaul.

Our Repair Capability

QTC repairs and overhauls 32104056-20 to the original manufacturer's specifications under our FAA and EASA Part 145 approvals. Our team — including former OEM pneumatic & air management engineers — performs teardown, inspection, cleaning, component replacement, functional testing, and certification, returning a serviceable unit with the appropriate airworthiness release. We also develop repairs for rejected and beyond-economic-repair (BER) hardware.

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Frequently Asked Questions