Abstract: To address the low bonding efficiency, poor bonding consistency, and blister-related failures of conventional silicone-rubber-bonded polyimide film heaters in spacecraft thermal control, rapidly applicable pressure-sensitive-adhesive (PSA)-backed heaters are planned for implementation in current batch-produced satellites. A PSA-backed polyimide film heater based on an acrylic-ester crosslinked system was developed, and vacuum thermal tests under three typical operating conditions were conducted. The failure thresholds and thermal performance of the PSA-backed and conventional silicone-rubber heaters were quantitatively compared using a stepped-temperature control scheme. The results indicate that the PSA-backed heater exhibits higher failure thresholds and improved interfacial stability at both room and low temperatures, together with faster thermal response and smaller temperature fluctuations. It operates stably from -80 ℃ to 180 ℃ and can sustain continuous operation for over 24 h without failure under limit currents of 0.9-1 A. These findings demonstrate that the PSA-backed polyimide film heater offers strong thermal adaptability for aerospace applications and can effectively replace the traditional silicone-rubber bonding process, providing an efficient technical solution for the production of spacecraft thermal control components.