Bosch gas wall-hung boiler manufacturer after-sales telephone-national 24-hour service center

Bosch after-sales service hotline: 400-9020-799

Bosch wall-hung boiler 24-hour service center specializes in repairing various failures of wall-hung boilers. The company has excellent maintenance personnel and superb technology.

We also take honesty as the lifeline, and win the trust and support of customers by stressing credibility and keeping promises. Set high standards for yourself,

From beginning to end, the work entrusted to us by our customers is perfect.

Maintenance tips:

1. All costs of this order need to be confirmed with the merchant (engineer) in the actual service process, and the costs will be charged according to the actual situation;

2. The door-to-door fee of this order (out of warranty period) does not include maintenance material fee, management fee, labor fee, etc.

3. The machine has been used for more than 15 years, and it is recommended to buy a new machine;

4. Issue a warranty form after maintenance, with a free warranty period of three to six months (the specific warranty time is related to refueling, and the warranty period has been issued);

5. Engineers have more than 5 years of maintenance/installation experience, so please feel free to choose;

6. Please check your mobile phone number carefully and keep your mobile phone open. After receiving the order, the engineer will communicate through this number or make an appointment for the specific door-to-door time;

Common faults and solutions of gas wall-hung boiler;

Overheating fault

Fault symptoms: flameout, alarm by the main controller, overheating and dry burning fault codes on the fault display screen.

Reason for failure:

(a) When the heating distributor is closed, the water temperature in the main heat exchanger rises rapidly, and the temperature of hot water exceeds 90℃, which leads to the opening of the bypass valve.

(b) The heating pipe is blocked, which slows down the water circulation, causing the water temperature to rise rapidly and the hot water temperature to exceed 90℃.

(c) The overheat protection thermostat is defective and should be normally closed instead of normally closed.

(d) The flow direction switching function of the three-way valve is disordered (three-way valve type), which may be due to the dislocation of the connecting pipeline or the dislocation of the ball assembly and the poor rotation of the ball, resulting in a small circulation of hot water entering the plate heat exchanger through the three-way valve during heating and a sharp rise in water temperature.

(e) controller failure.

(f) The distributor (switch) is installed in the opposite direction.

(g) the filter is blocked.

Solution:

(a) Open the heating distributor.

Clear the heating pipe.

(c) Replace the overheat protection thermostat.

(d) If the connecting wire is not aligned, correct the connecting wire; If the ball assembly is misplaced, please assemble the three-way valve ball correctly; If the ball rotates badly, replace the three-way valve.

(e) Replace the controller.

(f) Reassemble the distributor (switch) to make it in the correct direction.

(g) clean the filter.

National service and maintenance outlets:

Beijing, Shanghai, Guangzhou, Shenzhen, Hangzhou, Suzhou, Nanjing, Chongqing, Chengdu, Tianjin and Wuxi,

Changsha, Zhengzhou, Ningbo, Xi, Jinan, Qingdao, Hefei, Foshan, Dalian and Nantong,

Shenyang, Dongguan, Changzhou, Kunming, Yantai, Xiamen, Quanzhou, Shaoxing, Taiyuan, Nanchang, Changchun,

Tangshan, Wenzhou, Jiaxing, Shijiazhuang, Xuzhou, Harbin, Taizhou, Yangzhou, Weifang and Urumqi.

Zhuhai, Erdos, Jinhua, Luoyang, Guiyang, Zhenjiang, Zibo, Yancheng, Taizhou, Nanning, Huzhou,

Jining, Yichang, Weihai, Wuhu, Huizhou, Langfang, Zhongshan, Lanzhou, Xiangyang and Hohhot.

Zhangzhou, Yulin, Linyi, Cangzhou, Zhuzhou, Jiangmen, Baoding, Jiujiang, Daqing, Baotou, Ganzhou and Taian.

Huaian, Changde, Handan, Liuzhou, Lianyungang, Xuchang, Zunyi, Mianyang, Longyan, Dezhou, Jiaozuo and Chuzhou.

Xinxiang City, Hengyang City, Heze City, Suqian City, Putian City, Yueyang City, Sanming City, Nanyang City, Yichun City and Zhanjiang City can all provide on-site services.