Police in Cobourg are warning residents after a senior’s bank account was drained in a suspected home improvement scam. Investigators say the home owner was cold-called by a person who claimed to represent an HVAC maintenance company. “A group of four people, posing as workers, attended the residence and suggested she have a heat pump installed,” a Cobourg police release explained. A heat pump was installed, but police say the home owner was later repeatedly contacted by one of the individuals who requested additional payment. Cobourg police offer the following tips to protect yourself:Be wary of unsolicited calls or visits from individuals offering services or inspections.