This is no where near enough information to make this decision. @BostonOne is right, you need to compare your investment income with the sale income. And you need to put a value on your time and effort as a landlord, even if you do have a management company do all the difficult work.
An even simpler way of looking at it is like this:
Let’s say your home would sell today for $200,000. You have a mortgage on it for $150,000. Your monthly mortgage is $1000. You can rent the house out today for $2000. In an oversimplified equation (using net numbers, so assume you have factored in sales commissions and maintenance on the rental), you will make $1000/month profit. That’s $12,000 a year.
If you had $50,000 sitting in the bank right now, would you invest that $50,000 to make $12,000/year?
What if the equity in the home was $100,000 and the rent profit was only $500/month? Would you invest $100,000 to make $6,000 a year?
Figure out those numbers for your case and look at it like that. Pretend the home equity is cash in your pocket that you have to INVEST in order to make money as a landlord. DO NOT assume your house will continue to go up in value the way it has for the past 5 years - look mostly at the rental income in making your decision. Contrast that income with a conservative estimate of the income/appreciation you would get from another form of investment for the home equity.