Heat tune up replaced filter checked DT checked uv light and Air scrubber. Customer says that the filter should be provided since it part of there contract and also the bulb replacements for the Airscrubber. They use to get a box delivered to them. They only have one more filter left and would like to receive the box. Checked electro heaters. Checked compressor and fan amps. Cycled system working normally at this time.