Need HVAC person who can come out today. We noticed an awful smell yesterday afternoon downstairs (burning type smell), checked under the house (no smell) and no smell coming from the downstairs unit outside. We figured our heat just needed a break so we turned on the fireplace to help heat the downstairs and the smell went away. Overnight we turned the heat down to 65 so it wouldn’t try to run all night. Came down this morning and it’s 57, the heat isn’t running and the smell is back. Any recommendations for someone who can come out today to try and fix this? Thanks!