Most they can say to a request for a CLI is no. You might call the number on your CC and try to leverage the purchase into a CLI.
"Hi, I'd like to see about getting a CLI. Reason I'm requesting one is I got the CC, and I bought this new dryer from HD.
Please understand, I'm very happy with the dryer, I've shopped at HD for years, and I'm very happy with HD. Tried Lowes and True Value, and they are OK, but they just don't measure up to HD.
Anyway, back to the reason I'm calling, about getting a CLI on this CC. As I said, I bought the dryer, very happy with it, and very happy with the terms. No payments, no interest for 12 months. See the thing I'm concerned about though is it's a $450 purchase and a $500 CL CC. That's going to show up on my credit reports as a maxed out CC. The credit bureaus don't take into account that HD gave me this great offer of no interest and no payments for a year. So, is there any way you could help me out and bump my CL up to $2K? That would really help me out."