Maintaining furnace health can be tricky since their natural smokers' cough can mask serious afflictions such as flue flu, broiler bronchitis, and coal-miner's duct. Save your incinerator from infectious disease with today's Groupon: for $38, you get a 12-point furnace and heating checkup from On Time Electric & Air (an $89 value). Appointments are not available on weekends.

On Time Electric & Air has been making mechanical house calls to feeble heating units in the Houston area for almost 20 years. Whether your system is gas or electric, the friendly technician is licensed to administer a 12-point inspection to test for efficiency and functionality in order to ensure your furnace will be in proper working order throughout the coming winter months. Both system check-ups include an inspection and test of electrical power switches, float switches, and blower motors; a check for access to the evaporator coil (essential for proper cleaning, which promotes better circulation and a lower energy bill); and a check of evaporator and flow-pan drain lines. Gas systems will be privy to an inspection of the heat exchanger for cracks, rust, damage, and evidence of small arms trade, and a check and test of gas valves, pilot light, and proper flue ventilation helps safeguard against embarrassing gremlin infestation. Electrical units will have disconnects and amperage readings looked at by the technician, as well as verification of proper wiring and overcurrent protection. Finally, an examination of thermostats will ensure chilly family members reach their desired level of doneness, and a test of carbon monoxide and smoke detectors helps guarantee a safe and stress-free holiday season.

Appointments are required and can be scheduled any time Monday through Friday, from 8 a.m. to 5 p.m. This deal is good for single-family residential homes only, and inspection of only one heater or furnace per address is allowed, so customers currently living in residential ocean liners will have to play favorites.

Reviews

On Time Electric & Air has a number of five-star reviews on Google Maps and a perfect five-star average rating on Citysearch:

• Very pleasent [sic], efficient and knowledgeable service is greatly appreciated. I'm a GC and would not have anyone else at my house. – pstevens, Citysearch
• Came out and was very thorough. He explained everything so there were no suprises [sic]. He was pleasant and well mannered.
  – donald_m57, Google Maps