Bosch
Uneven Heat Distribution
Furnace runs but some rooms are cold while others are hot
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Possible Causes
Imbalanced hydronic circuit or duct system, Closed or partially closed registers/radiator valves, Air trapped in certain radiators, Undersized or blocked branch lines
How to Fix / Troubleshooting
Safety: Allow system to cool before bleeding radiators.
- Check outlets: Ensure all supply registers or radiator valves in cold rooms are fully open.
- Bleed air: Bleed radiators in cold rooms to remove trapped air.
- Balance system: Slightly close valves or dampers in overheated rooms to push more flow to colder areas.
Complex balancing of multi-zone systems may require a heating professional.
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Repair Difficulty
Easy
2/5
Required Part
Radiator Valves / Zone Valves
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