Walk back and forth until it is obvious Samus is on the doorshell. Use X-Ray, jump, and shoot down at the bottom of the jump, this may take a couple attempts. For a faster exit, place a Bomb on the door, then quickly unmorph and use X-Ray. With Grapple it is faster still; use X-Ray while crouched, then quickly use Grapple while angling down.

Requires:

"h_heatedGMode",
{"or": [
  {"heatFrames": 160},
  {"and": [
    "h_useMorphBombs",
    {"heatFrames": 85}
  ]},
  {"and": [
    "canUseGrapple",
    {"heatFrames": 50}
  ]}
]}

Exit condition:

"leaveNormally": {}

Unlocks doors:

{
  "types": ["missiles"],
  "requires": [{"heatFrames": 50}]
},
{"types": ["super"], "requires": []},
{
  "types": ["powerbomb"],
  "requires": [{"heatFrames": 110}]
}

Dev note: Requires leaving the room, as Samus is off camera and shouldn't be expected to do more in-room. It's possible to use a Bomb while still artificially morphed, but that only saves a few heat frames and is ignored.