When you think about heat pump maintenance, you probably picture cleaning filters or checking performance settings – not dealing with rodents. But recently, when we removed the covers from our own air source heat pump, we found clear evidence that mice had been inside. They had caused a fair bit of damage and it’s an issue every homeowner should be aware of.
Whether you live in an urban area or the middle of the countryside, mice and rats are opportunistic. Once temperatures start dropping, they look for warmth and shelter, and your heat pump’s outdoor unit can seem like the perfect winter home.
It’s strange how little attention manufacturers pay to keeping vermin out, given the amount of damage they can potentially cause. Heat pumps have drainage outlets, refrigerant pipes and cable runs that often leave small gaps or openings that are ideal entry points for small rodents.
Once inside, rodents can wreak havoc. In our case, one sensor cable was completely bitten through, another half-gnawed and the internal insulation was shredded.
Replacing chewed cables and sensors, damaged insulation or internal components can easily cost hundreds of pounds, sometimes more if control boards or pipes are affected. A five-minute inspection and a bit of preventative sealing could save you a lot of money and hassle down the line.
For the record. We’re not condoning killing mice or vermin. Please use non-lethal measures like sealing entry points to protect your heat pump without being cruel.
