Basics....unit is a Trane TWRO24C100A0 compressor and a TWHO24B140A1 air handler....been working for quite a while with no problems, but 2 years had a cap go...replaced cap and relay in the compressor, no problem until last winter....it quit while I was out of town working. Wife called local HVAC folks...they came out and put in a new Thermo (H-Well "PRO-3000) thinking that the old one had died (But apparently did no trouble-shooting as my wife wanted a programmable thermo anyway.) The tech wired the heat strips to be activated whenever the "Emerg. heat" setting was activated...got us thru winter but ouch on electric bill! This spring, switched over to air cond....no compressor activation! Tech has been out twice, said "Wiring bad between thermo and air handler". Huh?? I took thermo off wall, went under house and direct wired it to the A/H. Unit activates fan, no problem, but NO activation of compressor.
2nd visit tech says, "Fan control Board is bad...." So I got a new RLY02807 and installed. A/H fan works fine, but still won't activate the compressor. I did note that the LED on the defrost board in the compressor was not blinking as normal...tech says, "NO Big deal". I confirmed 24 VAC and proper AC to compressor (Push in relay and compressor runs...just RELAY not being activated).
WIfe is in NO MOOD to hear my tales of troubleshooting....she's in the "REPLACE THE D*^^ thing" MOOD. IF I had the $$, I'd do it just to keep the peace...but in the current economic climate, I"d REALLY like to get this thing running and get at least a few more years out of it....
Any hints, comments, or even a "HEY STUPID, REPLACE THE DA^^ thing?" Turning into a real head-scratcher for me....I'd really just like to know what the heck is wrong with it. More for my own knowledge and to tell the tech "Please look in this area."
A thousand thanks in advance!!!
Derswede
2nd visit tech says, "Fan control Board is bad...." So I got a new RLY02807 and installed. A/H fan works fine, but still won't activate the compressor. I did note that the LED on the defrost board in the compressor was not blinking as normal...tech says, "NO Big deal". I confirmed 24 VAC and proper AC to compressor (Push in relay and compressor runs...just RELAY not being activated).
WIfe is in NO MOOD to hear my tales of troubleshooting....she's in the "REPLACE THE D*^^ thing" MOOD. IF I had the $$, I'd do it just to keep the peace...but in the current economic climate, I"d REALLY like to get this thing running and get at least a few more years out of it....
Any hints, comments, or even a "HEY STUPID, REPLACE THE DA^^ thing?" Turning into a real head-scratcher for me....I'd really just like to know what the heck is wrong with it. More for my own knowledge and to tell the tech "Please look in this area."
A thousand thanks in advance!!!
Derswede
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