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One Room Not Cold, Not Low Gas

When one room is warm but other rooms are still cooling, a system-wide gas explanation usually does not fit. This case was narrowed by comparing room behavior first.

Case Details

LocationQueenstown, Singapore
BrandMitsubishi Heavy
Unit age10 yrs
ComplaintThe living room and another bedroom were cooling, but one room stayed warm. A gas top-up for the whole system was suggested.
CauseIndoor coil and airflow restriction in the affected room only
1

The Assessment

One-room cooling loss needs comparison first. We checked how the affected room behaved against the other rooms before calling it a system-wide issue.

  • Other rooms were still cooling normally
  • The affected room had weaker airflow and poorer cooling
  • The pattern pointed to a room-specific indoor-side issue
  • A whole-system top-up did not match the symptom spread
2

The Diagnosis

The problem was in the indoor side serving the warm room. Coil and airflow restriction in that room reduced cooling there, while the other rooms still performed normally. The symptom pattern did not support a system-wide gas issue as the first diagnosis.

Restore airflow and coil condition in the affected room first, then compare cooling again across all rooms before deciding on wider system work.

3

The Outcome

After the room-specific indoor-side issue was corrected, the warm room cooled normally again. A system-wide top-up was not the first fix needed.

Timeline

Initial complaintOne room stayed warm while others cooled
First adviceWhole-system top-up was suggested
Snowflake visitRoom-specific airflow and coil issue confirmed
After correctionAffected room cooling normalized
4

What This Means for You

One-room cooling loss often needs a room-specific check first.

  • One room stays warm while other rooms still cool
  • A whole-system top-up was suggested immediately
  • The weak room also has weaker airflow or slower cooling

Ask for a room-by-room comparison before you approve system-wide repair scope.