First off, WOW what a forum with such great info, I have learned a ton reading up on issues that have been solved that I have had problems with in the past on various projects.
My furnace is another matter, It's not my cup of tea at all. Older house with older furnace. (I can get model number if needed) On the attached picture, I have to "tap" this area on the gas valve, to assume this enables the gas to flow to electronic igniter & the furnace to come on. (Gas valve model is 36C84 type 201)
Thermostat (also older model) is set to come on at a certain temp. but the furnace does not. It will shut off at the desired temp. but will not come on by itself unless "tapped" as in the picture. Also, sometimes if the thermoset is set really low, & it is raised, the furnace will come on but that is few and far between.
Any ideas? Calling our local HVAC Co. is not a option currently $$$. Thanks in advance for your suggestions.