Should pipes freeze, Whatley said crawling under the house or in tight places with a propane burner for a thaw job could become the biggest mistake in the world. Where lines extend into wooden floors or insulation with a low combustion point, fire is possible. Whatley recommends the water be turned off and lines allowed to thaw. Home furnaces and similar systems may need to be checked by a professional technician. Swink pointed out that anyone can make a visual inspection, but might need the services of an experienced, trained technician for a closer look.
Attention needs to be given to possible rust build-up on furnace burners.
Cleaning might be needed to produce a clean blue flame. Professional service can reduce operating costs and provide preventive maintenance that will head off more expensive repairs. Heat pumps have special requirements, starting with the indoor filter. Swink said having a clean filter on the heat pump is more critical than filter maintenance in an air-conditioning system. Condensers also need attention and, like automobiles, a regular oil change.