Why is ELB health check failing?
An instance might fail the ELB health check because an application running on the instance has issues that cause the load balancer to consider the instance out of service.
How do I disable AWS health check?
To delete a health check (console)
Sign in to the AWS Management Console and open the Route 53 console at https://console.aws.amazon.com/route53/ . In the navigation pane, choose Health Checks. In the right pane, select the health check that you want to delete. Choose Delete Health Check.
Why is my load balancer not working?
If the load balancer is not responding to requests, check for the following issues: Your internet-facing load balancer is attached to a private subnet. You must specify public subnets for your load balancer. A public subnet has a route to the Internet Gateway for your virtual private cloud (VPC).